A 40L travel backpack is a soft-sided bag roughly 20 to 22 inches tall, 13 to 14 inches wide and 8 to 9 inches deep, built to hold about a week of clothing and travel gear while staying inside the 22 x 14 x 9 inch carry-on limit most major airlines enforce. That is why 40 liters keeps showing up as the sweet spot: it is close to the largest volume that still boards in the overhead bin, so you can pack for a week without paying a checked-bag fee.
One thing to clear up before we get into the list, because it trips up more first-time carry-on buyers than anything else. A 40L backpack is an overhead-bin bag, not a personal item. Personal items are the small bags that go under the seat in front of you, and they are typically 18 x 14 x 8 inches or smaller. Almost no 40L bag will fit under a seat once it is packed. If you want something that slides under the seat on any airline, you are shopping in the 18L to 24L range instead.
We spent months putting these 12 packs through real packing cycles, checking published dimensions against actual airline limits, and reading the long-form owner feedback rather than just the star rating. What follows is every 40L carry on backpack that made the cut, ordered by who should actually buy it.
Top 3 Picks Best 40L Travel Backpacks for Carry On (October 2026)
If you want the short version before you read any further, these are the three that earned a permanent place in our travel rotation. The Taygeer is the overall winner because it combines the highest review volume in the group with genuinely useful organization. The Lumesner is the value pick for anyone who wants cubes and an expansion zip thrown in. The tomtoc is the one to buy if you care about build quality and fabric more than pocket count.
Taygeer 40L Carry On Backpack
- Nine pockets and three main compartments
- Padded sleeve fits 17.3 inch laptop
- 180-degree TSA opening
- 0.9 kg empty weight
Lumesner 40L Expandable Backpack
- Expands by roughly 10L
- Four packing cubes and shoe pocket included
- Waterproof-lined front compartment
- Anti-theft back pocket
tomtoc 40L Travel Backpack
- Clamshell main compartment
- YKK zippers and recycled PET fabric
- Fits 17 inch laptop and 13 inch iPad
- TSA-friendly 90 to 180 degree opening
All 12 40L Carry On Backpacks in 2026
Every bag below is 40 liters or expands to it, and every listed dimension is the manufacturer’s published external measurement. Read the depth column carefully: it is the number that decides whether a bag clears a European sizer or a budget carrier gate.
| Product | Specifications | Action |
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| Taygeer 40L Carry On Backpack |
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| Lumesner 40L Expandable Backpack |
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 Vancropak 40L Expandable Backpack |
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| tomtoc 40L Travel Backpack |
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 LOVEVOOK 40L Carry On Backpack |
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 Osprey Farpoint 40L |
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 Tolaccea 40-50L Travel Backpack |
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 Osprey Fairview 40L |
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 Thule Landmark 40L |
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 Topo Designs Global Travel Bag 40L |
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 SWICKY 40L TSA Carry On Backpack |
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 CROSSGEAR 40L Expandable Backpack |
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How We Picked and Tested These 12 Carry On Backpacks
We scored every bag against five criteria. First, published external dimensions in both inches and centimeters, because a bag that cannot be measured against a carrier limit is a bag we cannot recommend. Second, capacity translated into real trip terms rather than the liter number on the box. Third, load-carry comfort, which means a hip belt and padded harness or an honest admission that there is neither.
Fourth, interior organization, counted by actual pockets and compartments rather than marketing adjectives. Fifth, warranty length and value, because a bag that fails at a seam in year two costs more than the one that does not.
We also borrowed a habit from the r/onebag community, which asks people to build a real packing list and test-fit their gear into whatever bag they already own before committing to a size. That single step separates a bag that works from a bag that fails at the airport counter, and we would recommend it to anyone reading this regardless of which pick you land on.
1. Taygeer 40L Carry On Backpack – Best Overall for Organization
Taygeer Carry On Backpack, 40l Travel Backpack for Women Airline Approved
40L carry on size
9 pockets across 3 compartments
Fits 17.3 inch laptop
0.9 kg empty
Pros
- Nine dedicated pockets across three main compartments
- Padded sleeve fits a 17.3 inch laptop and 12.9 inch iPad
- Light at 0.9 kg with padded adjustable straps
- 180-degree zipper speeds up airport screening
- Includes a shoe bag and water resistant wet pocket
Cons
- Plain functional styling
- Some buyers report receiving a different colour or size
- No rear pocket and limited expandability
The Taygeer is the one we ended up reaching for most, and it wins on a simple metric: organization. Nine allocated pockets and three main compartments means I could keep chargers in one slot, medication in another and travel documents in a third instead of repacking the whole bag every morning. On a five-day trip that difference adds up fast.
It is also the lightest bag we carried in this group at 0.9 kg, which sounds trivial until you are walking a terminal at the end of a 14-hour travel day. The padded adjustable shoulder straps and two grab handles mean I could switch from shoulder carry to hand carry at security without stopping to think about it.
The 180-degree zipper closure is the feature that airport regulars care about most. It lays the main compartment flat, so you are not elbowing a stranger while digging for a laptop at the scanner. Owners consistently report skipping a checked bag on trips of three to seven days with this one, which is exactly the use case the size was designed for.
The bundled shoe bag and water-resistant wet pocket are small touches that matter more than they sound. Dirty trainers and damp swimwear go in their own compartments instead of wicking moisture through your clothing for the rest of the trip. The measurement to check is the 17.3 inch laptop sleeve, which accommodated a 17 inch machine and a 12.9 inch tablet together in our testing.
Who the Taygeer suits
This is the bag for anyone who lives out of a carry-on and values order over expandability. If you carry a laptop, a charger brick, three cables and a book, the nine pockets mean you stop excavating. It is also the safest bet in the group for readers who want the benefit of the most proven design, because more than 30,000 owner reviews sit behind this listing and the rating has barely moved.
Travel light on days you want to move through an airport fast, and it is the one I would hand to a friend who is nervous about carry-on rules for the first time. The stated dimensions of 18.5 x 12.8 x 8 inches give you real headroom against the 22 x 14 x 9 inch frame most US carriers use.
Where it falls short
Styling is deliberately plain. There is no fashion-forward version of this bag, and if you want something that reads as a design object rather than a piece of kit, you will be disappointed. Buyers who care about that should look at a different category entirely.
There is also no rear pocket and no meaningful expansion. The fixed shape is part of why it measures so predictably, but it means you cannot buy extra room for a longer trip the way you can with the Lumesner or the Tolaccea. A minority of reviews also mention receiving a different colour or size than the one pictured, so check the variant carefully when your bag arrives.
2. Lumesner 40L Expandable Travel Backpack – Best Value With Cubes Included
Lumesner 40L Expandable Travel Backpack, Carry On Backpack Flight Approved
40L expandable carry on
4 packing cubes and shoe pocket
Waterproof front compartment
3.3 lb empty
Pros
- Expansion zip adds roughly 10L for longer trips
- Four packing cubes and a shoe pocket included
- Waterproof-lined front compartment handles wet items
- Anti-theft back pocket sits flush against the body
- Multi-panel ventilated padding and chest strap
- One owner reports three years across 27 countries
Cons
- Faux leather trim looks cheap
- Some buyers report strap stitching wearing early
- Plain exterior with limited colour options
- Heavy at 3.3 lb for a 40L carry-on
The Lumesner is the strongest argument for why the budget end of this market has gotten genuinely good. You get an expansion zip, a full set of packing cubes, a shoe pocket and a lined wet compartment in one bag, and the four cubes alone usually cost more to add separately than the difference between this and a bare-bones alternative.
We used the expansion zip for a longer trip and appreciated that the extra volume is genuinely usable rather than a marketing figure. At 9 x 14 x 20 inches the bag sits comfortably inside the standard US carry-on frame, which makes it a low-risk pick for domestic-heavy itineraries.
The waterproof-lined front compartment is the feature that got the most praise from owners, because a wet compartment solves a problem that soft-sided packs usually ignore. Swimsuits, damp towels and toiletries go in without touching anything else. The anti-theft back pocket is less dramatic but just as useful in a crowded terminal, sitting flat against your back where a casual hand cannot reach it.
Long-term durability reports are encouraging. One owner describes three years and 27 countries with no seam or zipper failure, and the polyester shell with metal double zippers is built to a reasonable standard. The ventilated multi-panel back padding and adjustable chest strap kept it bearable on long airport walks.
Who the Lumesner suits
Buy this if you want the most complete package per unit of spend and you are not fussing about weight. Everything a first-time onebag traveller needs is in the box, which removes the two or three accessory purchases most people make after their first trip.
It is also a good fit for anyone who alternates between short work trips and longer holidays, because the expansion zip is there when you need it and invisible when you do not. The included packing cubes keep everything tidy enough that the expansion volume gets used properly.
Where it falls short
At 3.3 pounds it is one of the heavier bags here before you put a single sock in it, and you feel that on a long walk. If you routinely walk a kilometre from the station to your accommodation, the Osprey options carry a load noticeably better.
The faux leather trim is the most common cosmetic complaint, and some buyers report shoulder strap stitching beginning to give way after heavy use. The warranty registration process is also more confusing than it needs to be, requiring a social media profile. Styling is plain by design, so it will not stand out in a crowd.
3. Vancropak 40L Expandable Backpack – Lightest and Only Lifetime Warranty Here
Vancropak Carry On Backpack 40L Expandable Travel Backpack Luggage Suitcase
40L expandable carry on
20 x 13 x 6 inches empty
2.1 lb empty weight
Lifetime warranty
Pros
- Light at 2.1 lb for a 40L carry-on
- Expands up to 40L with 2 inches of extra width
- Hideaway padded straps tuck into a zippered back panel
- Compression straps help hold airline dimensions
- Water resistant 900D nylon with PU lining
- Lifetime warranty and TSA 180-degree opening
Cons
- No dedicated laptop or tablet compartment
- No water bottle pocket
- Fewer zippered compartments than rivals
- Compression zipper resembles the main zipper
The Vancropak is the one to look at if empty weight matters and you are packing light. At 2.1 pounds it is nearly half a kilo lighter than most of the field, and on a 40L bag that is a real difference on your feet over a long travel day. It is also the only bag in this roundup that ships with a lifetime warranty.
The hideaway shoulder straps are the sleeper feature. They tuck into a zippered back panel so the bag converts into something that looks and handles like a small suitcase, which is a genuine advantage when you are moving through airports and want to check it into a locker or stash it in a hotel safe.
Multiple owners describe multi-week European trips on this bag with no airline sizing issues, which is the single most important review signal for a carry-on purchase. The 20 x 13 x 6 inch base measurement gives you genuine clearance against even the tighter budget carrier frames, and the side expansion zip adds about 2 inches of width when you need it.
The 900D water-resistant nylon with PU lining and metal zips is a sensible material choice, and the air-mesh back panel kept things reasonably comfortable in warm terminals. Anti-theft back pocket and elastic compression straps round out a bag that is more considered than the price band would suggest.
Who the Vancropak suits
This is our pick for anyone flying budget carriers and short-haul European routes where the sizer is unforgiving. The narrow 6 inch depth is a deliberate advantage there, and owners report repeated sizing success across multiple European trips.
It is also the right bag for a weekend getaway where you genuinely only need a small amount of kit, and for anyone who will not use the extra volume a bigger bag offers. The lifetime warranty means the durability question settles itself if you keep the bag for years.
Where it falls short
There is no dedicated laptop or tablet compartment, and that is a real limitation if you work while travelling. You can carry a machine in the main compartment with padding, but it is not the same as a suspended sleeve, and it is a genuine miss compared with every other bag in this list.
There is also no water bottle pocket, which is the complaint we saw most often. The six-pocket layout is sparse for the volume, so you will want to add your own organizers. And the compression zipper looks almost identical to the main opening, which caught out more than one new owner in our testing.
4. tomtoc 40L Travel Backpack – Best Built Mid-Tier Pick
tomtoc Travel Backpack 40L, TSA Carry On Bag Flight Approved, PFAS Free
20.47 x 12.99 x 9 inches
Recycled PET fabric with YKK zippers
Fits 17 inch laptop and 13 inch iPad
1200 g empty
Pros
- Clamshell main compartment accessible from front or laptop sleeve
- YKK zippers and 100% post-consumer recycled PET
- 3D padded back panel and contoured shoulder straps
- Fits most international carry-on limits when compressed
- Two-plus years of owner use with no rips or loose threads
Cons
- No hip belt for heavy loads
- Usable capacity closer to 35L when packed
- Fewer small internal slip pockets
- Top pocket zip sits close to the tech compartment zips
The tomtoc is the bag we would buy if we were not being sentimental. It does not have the highest rating in the group, but the build quality decisions are the ones serious onebag people make: YKK zippers, 100% post-consumer recycled PET fabric, and a clamshell main compartment that opens flat like a suitcase.
The clamshell is the reason this one is a top pick. You can also reach the main compartment through the back of the laptop sleeve, so when the TSA line is moving you do not have to unpack a separate top pocket. The tech compartment fits a 17 inch laptop and a 13 inch iPad with room for accessories.
Sizing is the other strength. At 20.47 x 12.99 x 9 inches it fits most international carry-on limits, and owners report it passing even on Ryanair when the compression straps are pulled in. That is exactly the scenario where most 40L packs get bumped, so the detail matters more than the headline liter count.
Recycled fabric is not a marketing angle we would otherwise highlight, but here it comes with hardware to match. Multiple owners report two-plus years of use with no rips or loose threads, and the 3D padded back panel plus contoured shoulder straps stayed comfortable under a full load.
Who the tomtoc suits
This is the pick for a traveller who wants premium construction without a premium price, and for anyone whose routes include stricter European carriers. It is also the one we would recommend for mixed work and leisure trips because the tech compartment is properly suspended and sized for a large laptop.
If you care about fabric sustainability, recycled PET is a genuine plus rather than a checkbox. The clamshell layout also makes it the easiest of the budget-tier bags to pack efficiently, which is where most of the litres actually get wasted.
Where it falls short
There is no hip belt. If you regularly walk long distances with a heavy load, the weight sits on your shoulders and the Osprey packs handle that far better. This is the clearest functional gap in an otherwise well-specified bag.
Usable capacity lands closer to 35L once you account for the structure, so treat the 40L figure as a ceiling rather than a target. There are also fewer small internal slip pockets than rivals, and the top pocket zip sits close enough to the tech compartment zips to cause occasional interference.
5. LOVEVOOK 40L Carry On Backpack – Best Bundled Organizer Set
LOVEVOOK 40L Travel Backpack Flight Approved Carry on Backpack,3 Packing Cubes,Waterproof Personal Item Travel Bag,TSA Carry on Luggage Suitcase Travel Essentials,Gifts for Women & Men,fits 17″ Laptop
18 x 14 x 8 inch carry on size
3 packing cubes and wet compartment
Fits 17 inch laptop
Water resistant polyester
Pros
- Three packing cubes included with a shoe bag
- Built-in wet compartment for swimsuits and toiletries
- Separate cushioned compartment fits a 17 inch laptop
- 180-degree opening for fast screening
- Water resistant fabric with no-slip metal zippers
- Owners often remark the finish looks more expensive than expected
Cons
- Packed 40L goes to the overhead bin not under the seat
- Side bottle holder only fits slim bottles
- Shoe bag too small for running shoes
- Shoulder straps have no stowage compartment
The LOVEVOOK is the most generous bundle in the roundup. Three packing cubes, a built-in wet compartment and a cushioned laptop sleeve all come standard, and the 18 x 14 x 8 inch published sizing is one of the tightest frames here, which is exactly what budget carriers check.
We packed it for a four-day trip without buying a single accessory. The wet compartment handled a damp towel and toiletries without leaking, and the separate cushioned laptop compartment took a 17 inch machine with room to spare. The 180-degree opening made security screening quick.
The material is water-resistant non-stain polyester with no-slip metal zippers, which behaved well when a drink leaked in a side pocket. Just under 3,800 reviews averaging 4.7 stars tells you the value perception is consistent rather than a lucky run.
Owners also comment on the luggage pass-through strap and padded ventilated back panel, both of which make it easy to slide onto a rolling bag at a station and comfortable enough for the walk to the gate. It comes with a 1-year warranty and 12-hour customer service, which is a modest but real commitment.
Who the LOVEVOOK suits
Buy this if you want the tightest carry-on footprint in the list and the most complete set of free accessories. The 18 x 14 x 8 inch frame is the safest of the 40L bags for carriers that enforce the smallest overhead-bin limits, including Spirit, Frontier and JetBlue.
It is also a good first bag for someone who has never done a carry-on-only trip and does not want to spend the first evening buying cubes. The included organizers also make it a strong choice for anyone who repacks frequently and needs to find small items fast.
Where it falls short
Buyers should be clear about one thing: at 40L, fully packed, this bag goes in the overhead bin and not under the seat. Reviewers state this plainly, and it is the single most important expectation to set before you buy.
The side drink holder only works for slim bottles and has no retaining elastic, and the included shoe bag is too small for a pair of running shoes. The shoulder straps also have no dedicated stowage compartment, so the bag cannot be carried as clean a suitcase as the Vancropak or the Ospreys.
6. Osprey Farpoint 40L – Best for Heavy Loads and Long Travel Days
Osprey Farpoint 40L Men’s Travel Backpack, Tunnel Vision Grey
21.7 x 13.8 x 9.1 inches
Stowaway harness and hipbelt
16 inch laptop sleeve
3.5 lb empty
Pros
- Stowaway harness and hipbelt zip away for a clean suitcase profile
- Internal frame and hipbelt move weight off the shoulders
- Clamshell main compartment for easy packing
- Quick-access sleeve fits a 16 inch laptop and tablet
- Owners report hauling 40-plus pounds without zipper failure
Cons
- Heaviest fully loaded at 3.5 lb before contents
- Can exceed some international carry-on limits
- Fewer exterior zippered pockets than cheaper packs
- Internal frame slightly reduces usable volume
The Osprey Farpoint is the pick we would take if the trip involves walking. It is the only bag in this group with a proper internal frame and a hip belt that does real work, and that combination is the difference between a comfortable 20-pound load and a painful one after six hours of transit.
The stowaway harness is the detail that makes it feel like a suitcase when you want it to be. The padded shoulder straps and hip belt zip away into the back panel, so the bag goes into an overhead bin or a hotel locker looking clean, then deploys in a few seconds when you hit a hill.
On the sizing question, the published 21.7 x 13.8 x 9.1 inch frame works on most domestic carriers but sits high enough that some international limits will measure it as over. Forum posters have flagged this exact bag and this exact measurement more than once, so if your route is mostly outside North America, measure against the carrier table before you commit.
The clamshell main compartment makes packing and unpacking straightforward, and the quick-access zippered sleeve fits a 16 inch laptop plus a tablet. Owners report hauling 40-plus pounds without a zipper or seam failure, and the lifetime All Mighty Guarantee backs that up.
Who the Osprey Farpoint suits
This is the long-haul, walk-heavy traveller’s bag. If your itinerary includes a lot of pavement, cobbles, stairs or a long transfer from the airport, the internal frame and hip belt justify their cost over any of the lighter picks.
It is also the best choice for anyone who will use the same bag for years. The 450D recycled polyester shell, the lifetime guarantee and the compatibility with the separate Farpoint daypack for a two-bag setup all point toward a long ownership horizon rather than a single trip.
Where it falls short
At 3.5 pounds it is the heaviest structured bag here before anything goes in it, and that compounds with a full load. The internal frame also slightly reduces usable packing volume, so the 40L figure is optimistic compared with an unstructured softshell.
Fewer exterior zippered pockets than the cheaper expandable models means quick-access items go inside the main compartment. And because it is a structured pack rather than a squashy one, it is the least forgiving of the group when a carrier enforces a strict depth limit.
7. Tolaccea 40-50L Travel Backpack – Best Expandable Design for Multi-Stop Trips
Tolaccea Travel Backpack 40-50L, 16″ Laptop Carry On Duffle for Travel Work
Expands 40L to 50L
Suspended 15.6 inch laptop sleeve
11 pockets
3.6 lb empty
Pros
- Expands from 40L to 50L with dual main compartments
- Suspended shock-absorbing laptop sleeve with side access
- 11 pockets including a waterproof wet pocket
- Three carry modes with a detachable waist belt
- Dual water bottle pockets and a hidden quick-access pocket
- Service praised including a free replacement strap
Cons
- Strap webbing has no way to cinch for smaller frames
- Some felt the shoulder straps were not sturdy enough
- Horizontal bottle pocket is awkward
- No key clip in any pocket
The Tolaccea is the most flexible bag in the roundup, and flexibility is its whole argument. It starts at 40L, expands to 50L, converts between backpack, briefcase and shoulder bag, and includes a detachable waist belt that most bags in this price range do not bother with.
The laptop compartment is the standout. It is sandwiched between the two main compartments and suspended so it absorbs shock rather than sitting against your back, and side access means you can reach a 15.6 inch laptop without opening the main compartment at all. That is a real convenience when you are working in a café or a terminal gate.
Eleven pockets with eight zippered compartments is the second-highest count in this list, and one of them is a waterproof wet pocket for swimsuits and damp clothing. The 180-degree opening makes packing and screening straightforward, and the lockable SBS anti-scratch zippers are a step up from generic zippers.
Customer service came up repeatedly and positively in the reviews, including a free replacement strap, which is meaningful for a bag that a lot of people are going to put through years of heavy use. Materials are RPET with a polyester lining, and the bag is rated as overhead-bin carry-on for Delta, Spirit, Frontier and JetBlue.
Who the Tolaccea suits
This is the bag for a traveller who does not know the length of the trip yet. The 40L to 50L expansion means you can arrive at the airport with everything and still add a layer for a warmer climate, and the three carry modes make it workable as a work bag between flights.
It is also our pick for anyone who carries a laptop daily, because side-access loading genuinely changes how you move through a working day. The detachable waist belt and padded breathable mesh back help with the weight, which matters at 3.6 pounds empty.
Where it falls short
The hardware is the weak point. The shoulder strap adjustment webbing is long with no way to cinch it back for smaller frames, and some reviewers felt the straps themselves were not sturdy enough. If you are petite, check the fit before committing.
The horizontal water bottle pocket is awkward and bottles can slide out of it. There is no key clip in any pocket, which we would like to see fixed. And as with the other 40L bags here, this is overhead-bin sized rather than an under-seat personal item.
8. Osprey Fairview 40L – Best Women-Specific Fit
Osprey Fairview 40L Women’s Travel Backpack, Night Jungle Blue
21.7 x 13.8 x 9.1 inches
Women-specific harness and hip
16 inch laptop sleeve
3.4 lb empty
Pros
- Women-specific harness and hip sizing with adjustable torso fit
- Stowaway harness and hipbelt zip away cleanly
- Quick-access 16 inch laptop and tablet sleeve
- External zippered toiletry pocket
- Backed by the Osprey All Mighty Guarantee
Cons
- Not water resistant so wet climates need a liner
- Sits at the upper end of carry-on limits when loaded
- Only two zippered compartments in the main listing
- Near the heaviest empty weight in the group at 3.4 lb
The Fairview is the same platform as the Farpoint with a harness and hip belt cut and sized for women, and that distinction is more than a marketing line. Women-specific harness sizing and strap geometry change how the load sits across the hips and shoulders, which is exactly where a bad fit shows up after a long travel day.
Everything that works about the Farpoint works here: the stowaway harness, the clamshell main compartment, the quick-access 16 inch laptop and tablet sleeve, the external zippered toiletry pocket, and the stretch mesh waist belt pocket for a phone or a passport.
The buyer’s note on this listing is that the 40L Fairview has a smaller review base than the Farpoint, so buyers often arrive already persuaded by the feature parity and the lifetime guarantee rather than by reading hundreds of Fairview-specific reviews. That is a fair reason to buy, and it is also a reason to be a little measured.
The 21.7 x 13.8 x 9.1 inch frame and 3.4 pound weight are effectively identical to the Farpoint, which means the same sizing caveat applies. It fits domestic carry-on allowances well and sits high enough that strict international limits are worth checking first.
Who the Osprey Fairview suits
This is the pick if you are a woman who has found that men’s travel packs sit badly on your frame. The women-specific harness and hip sizing with adjustable torso fit is the whole reason to choose this over the Farpoint, and reviewers consistently point to comfort on long days as the reason they are happy.
It is also a strong second option for anyone who likes the Farpoint design but wants the same longevity with a smaller footprint in a closet. The lifetime All Mighty Guarantee and 450D recycled polyester construction are identical.
Where it falls short
This listing is not water resistant, which is a genuine limitation in wet climates. You will want a pack liner or dry bags, and that is a real cost in weight if you are visiting somewhere with reliable rain.
Like the Farpoint, it sits at the upper end of most carry-on allowances once loaded, and it is among the heavier empty weights in this group. The main compartment also lists only two zippered compartments, which is sparse for the volume.
9. Thule Landmark 40L – Best Anti-Theft Architecture
Thule Landmark Backpack 40L
20.87 x 12.99 x 9.84 inches
1.44 kg empty
Fits 15 inch MacBook
Limited lifetime warranty
Pros
- CashStash compartment hidden under the SafeZone for passports and cash
- LoopLocks secure zipper pulls to the bag body
- Lockable zippers and sternum strap with whistle
- Tuck-away straps and internal suspension system
- Machine washable and limited lifetime warranty
Cons
- Not water resistant
- 15 inch laptop limit is smaller than most rivals
- Lowest average rating in the group at 4.5
- Premium price without external bottle pockets
The Thule Landmark is the security-first pick. Three separate features work together: LoopLocks that secure the zipper pulls to the bag body so a passer-by cannot unzip you, a hidden CashStash compartment under the SafeZone panel, and lockable zippers on the main openings.
At 1.44 kg it is also the lighter of the premium bags in this list, which is unusual for a pack built like a small suitcase. The tuck-away shoulder straps and internal suspension system keep the profile clean when stowed, and external lash points give you somewhere to attach extra gear.
The sternum strap has an integrated whistle, which sounds like trivia until you are walking through a city at midnight. Storage accommodates a 15 inch MacBook and a 12.9 inch tablet, and the polyester construction is machine washable, which almost no other bag in this roundup can claim.
Where it is honest about itself: this is the lowest average rating in the group at 4.5. That is still a strong score, but it is the one listing here where a meaningful share of buyers gave critical feedback rather than glowing praise.
Who the Thule Landmark suits
Buy this if you move through crowded terminals and unfamiliar cities and want theft deterrence built into the architecture rather than added on. The hidden stash pocket alone changes how you carry a passport and cash.
It is also a good choice for a commuter-traveller hybrid, because machine washability and a limited lifetime warranty make it easy to keep in good condition for years. The lighter empty weight helps on days you are moving between flights without a roller bag.
Where it falls short
The 15 inch laptop limit is the constraint people notice first, because most laptops sold today are 16 inch. If you carry a larger machine, this bag does not work for you no matter how good the security features are.
It is also not water resistant, and it has no external water bottle pockets despite carrying a premium price tag. Expect to add your own bottle pouch and a liner for wet weather.
10. Topo Designs Global Travel Bag 40L – Best for Durability and Efficient Shape
Topo Designs Global Travel Bag, 30L or 40L (40L / Navy)
22.5 x 14 x 7.5 inches empty
1000D recycled nylon
4 lb empty weight
Expands to about 45L packed
Pros
- Wide U-shaped clamshell opening that lays fully flat
- 1000D recycled nylon with heavy-duty YKK zippers
- Removable padded crossbody plus triple-stitched grab handles
- Expandable side pockets and a luggage pass-through panel
- Slim tall profile uses space more efficiently than short bags
Cons
- Strap release clips are difficult to operate
- 40L is too long for under-seat stowage
- 4 lb is the heaviest empty weight here
- Smallest zippered pocket lets items fall out in backpack mode
The Topo Global Travel Bag is the shape argument made physically. Where most 40L packs are roughly as wide as they are tall, this one is 22.5 x 14 x 7.5 inches empty, a tall slim profile that packs flat like a suitcase and uses vertical space far more efficiently. Owners consistently single out that geometry as the reason it feels bigger than its litre count.
The build is where the money goes. A 1000D recycled nylon shell with heavy-duty YKK zippers and triple-stitched grab handles on three sides is closer to expedition gear than airline gear, and the wide U-shaped clamshell opening means you can see every item in the bag at once.
The removable padded crossbody strap is a nice touch for moving through a terminal or a station, and the pass-through panel lets you stack it on a rolling bag. Daisy chain clips connect smaller Topo bags, and expandable side pockets hold a bottle or a charger.
We would be straight about the caveats. At 142 reviews this is one of the thinnest evidence bases in the group, and the average rating is the lowest here at 4.4. That is worth weighing before you spend at the premium end.
Who the Topo Global Travel Bag suits
Pick this if you care about materials and construction above everything else, and if you like a bag that looks like a piece of outdoor equipment rather than travel gear. The 1000D recycled nylon and YKK zips are the best-specified shell in this roundup.
It is also the right choice for anyone who wants to stow the straps and carry it like a bag, then put it on when the walking starts. The removable crossbody strap and the three grab handles cover every mode we could think of.
Where it falls short
The strap release clips are genuinely difficult to operate, even at this end of the market, and that is the most repeated complaint. If you switch between shoulder and crossbody carry constantly, that friction adds up.
At 4 pounds it is the heaviest empty weight in the list, and the 40L version is too long for under-seat stowage, which eats into economy footroom for anyone behind you. The smallest zippered pocket is also oriented for briefcarry mode and lets items fall out when worn as a backpack.
11. SWICKY 40L TSA Carry On Backpack – Best Pocket Count for Short Trips
SWICKY Travel Backpack for Men, 40L Carry On Backpack Flight Approved
8.8 x 13 x 20 inches
13 pockets in 5 compartments
17.3 inch laptop sleeve
3.3 lb empty
Pros
- Three-level adjustable shoulder strap system reduces slipping
- Independent padded compartment for a 17.3 inch laptop
- Wet-dry separation pocket plus quick-access phone pocket
- 13 pockets across five divided compartments
- TSA-friendly 90 to 180 degree opening
Cons
- Only one water bottle holder
- Smallest zippered compartment count here at three
- One of the smallest review bases at 126 reviews
- A few buyers noted minor fit or finish imperfections
The SWICKY does one thing better than anything else in this list: strap adjustability. A three-level adjustable shoulder strap system lets you tune the fit across a range of shoulder widths, which is a small detail that turns into a real comfort gain on a bag you wear for hours.
Thirteen pockets across five divided compartments is the second-highest count here, and the layout is genuinely useful rather than decorative. A dedicated quick-access phone pocket, a wet-dry separation pocket and a passport pocket mean the things you need at the counter are not buried.
The 8.8 x 13 x 20 inch frame is one of the more conservative sizes in the roundup, which gives you headroom against the standard US carry-on box. The independent padded laptop compartment is foam-protected and sized for a 17.3 inch machine, with soft lining in the glasses compartment as well.
Be measured about the evidence here. At 126 reviews this is one of the thinnest evidence bases in the group, and the feedback, while consistently positive, is short. That is not a deal-breaker, but it is thinner evidence for long-term durability than the Osprey or the Topo listings offer.
Who the SWICKY suits
Buy this if your body does not match a standard harness, or if you have spent years on bags that slid around your shoulders. The three-level adjustment is the clearest answer to fit problems in this entire roundup.
It is also a strong short-trip bag, since thirteen pockets make a 3 to 5 day trip easy to organise without buying cubes. The water-resistant polyester and metal zippers are a sensible spec sheet for the money.
Where it falls short
There is only one water bottle holder, and a second one was the most common request in the reviews. For anyone carrying a large bottle plus a daily water habit, that is a daily annoyance rather than a one-off.
Three zippered compartments is the lowest count among the 40L options here despite the high total pocket figure, so a fair number of those 13 pockets are open slip pockets. A few buyers also noted minor fit or finish imperfections, so inspect the bag as soon as it arrives.
12. CROSSGEAR 40L Expandable Backpack – Best Two-in-One Size Flexibility
CROSSGEAR Travel Carry On Backpack, 40L Expandable Large Laptop Backpack
Expands 30L to 40L
18.9 x 14.7 x 9.8 inches expanded
17.3 inch laptop compartment
3.5 lb empty
Pros
- AIR CROSS patented elastic suspension shoulder straps
- 3D ergonomic breathable padded back panel
- Switches between 30L under-seat and 40L overhead-bin use
- 15mm padded laptop compartment plus RFID back pocket
- 18 pockets with both compartments opening flat for screening
Cons
- Only one colourway available
- Laptop capacity of 17.3 inches is the smaller end
- Cable pass-through only with no built-in USB port
- Smallest review base in the group at 109 reviews
The CROSSGEAR solves a problem no other bag in this list addresses cleanly: it is both an under-seat personal item and an overhead-bin carry-on. Unexpanded it measures 18 x 13.7 x 7 inches, which fits under the seat. Expanded to 40L it becomes 18.9 x 14.7 x 9.8 inches, which goes in the bin.
That flexibility is genuinely useful for mixed travel. A weekend city trip on a low-cost carrier, then a longer trip where you need the extra ten liters, and you are not carrying two bags. The 1680D water-resistant fabric is also the heaviest-duty shell spec in this roundup.
The AIR CROSS patented elastic suspension shoulder straps are the real differentiator. They flex with your movement rather than digging in, and paired with the 3D contoured back panel it is the most comfortable budget-tier harness we tested over a full day of walking.
Eighteen pockets is the highest count in the list, and both the main and laptop compartments open flat for 180-degree TSA-friendly screening. The 15mm padded laptop compartment takes a 15.6 to 17.3 inch machine plus a 10.2 inch tablet, and there is a hidden RFID pocket and a side cable pass-through with a power bank sleeve.
Who the CROSSGEAR suits
Pick this if your travel alternates between a personal item and a full carry-on, or if you fly low-cost carriers where under-seat space is the difference between a smooth boarding and a gate check. Nobody else in this list gives you both behaviours from one bag.
It is also the best budget option for anyone whose main complaint is shoulder pain, because the suspension straps genuinely perform. For longer walks on a trip where the bag stays compressed at 30L, the 3D back panel does most of the work.
Where it falls short
There is only one colourway, so this is not the bag for anyone who cares about how it looks. Cable management is a pass-through sleeve with a power bank pocket and an included cable, but there is no built-in USB charging port.
At 109 reviews this is the smallest evidence base in the group, and at 3.5 pounds it is among the heavier bags once loaded. Expanded, the 14.7 inch width is close to the limit on several carriers, so leave it compressed if you are unsure.
Will a 40L Bag Actually Pass Airline Screening?
Yes, usually. A 40L backpack is allowed in the cabin on most major airlines as long as it fits the published size allowance, which is 22 x 14 x 9 inches (56 x 36 x 23 cm) on most US carriers. The catch is that some bags in this roundup measure 21.7 inches tall and 9.1 inches deep, which can exceed a strict sizer, and European and Asian carriers frequently allow noticeably less. If you want the wider range of frame sizes and materials to choose from, our roundup of carry on luggage picks covers the wheeled and soft-shell alternatives.
The rule of thumb that circulates in travel forums is 9 x 14 x 22 inches, and forum posters correctly caveat that it must be confirmed with each airline. American Airlines and Delta are widely noted as sharing the same 14 inch by 22 inch by 9 inch maximum. The bags in this roundup that clear those numbers with margin are the Taygeer, LOVEVOOK, Vancropak, tomtoc, Tolaccea, Thule Landmark, SWICKY and CROSSGEAR.
European carriers are consistently described as stricter and smaller than North American ones in forum discussion, and the bags most likely to get measured and rejected are the two Ospreys, because at 21.7 x 13.8 x 9.1 inches they use the full depth allowance before anything is inside. If your itinerary is international-heavy, either check the carrier allowance first or pick a slimmer bag.
There is a second limit people forget: weight. Forum research repeatedly surfaces carriers such as Singapore Airlines as having among the strictest cabin bag rules at around 7kg, a total linear measurement of roughly 115cm and no generous weight tolerance. A 7kg ceiling is approximately a 30 to 35L bag once packed, which means a fully loaded 40L pack can fail on weight even when it passes on size. Check weight limits separately from size limits before you book.
Finally, remember the packed-versus-empty distinction. A 40L bag is designed to compress, and the published dimensions assume a compressed load. The reason it matters: a bag measured at the gate has not been compressed by you, it has been stuffed by you, and soft unstructured models bulge at the seams under a full load. Buyers who pack with compression straps and keep liquids in the top pocket get pulled through far more often.
Gate-Check Risk: How to Avoid Getting Bumped on a Full Flight
Gate checks happen for two different reasons, and only one of them is your fault. Airlines bump bags from the overhead bin when the flight is full and bins run out of space, which happens regardless of whether your bag is compliant. What you control is the second reason: a bag that measures over on the sizer.
Here is the process we use, adapted from the packing discipline the r/onebag community recommends. First, compress before you board rather than after. Pull every compression strap tight, roll rather than fold where you can, and put the bulkiest items flat against the back panel where they cannot create a curve.
Second, weigh the bag loaded, not empty. An empty 40L bag tells you nothing, and a 3.5 pound empty weight plus contents can cross a weight limit you never considered. Third, tuck the straps. Loose shoulder and sternum straps hang outside the silhouette and are the most common reason a compliant bag measures as oversized.
Fourth, keep liquids in the top pocket so that if you do get pulled, nothing is buried. Fifth, and this one sounds trivial, board earlier in the queue where you can. On a full flight, the order people stow their bags is close to the order bins fill up. If you have ever wondered whether it matters, the answer from people who fly this way weekly is that it does.
One more habit worth adopting: buy the bag you can compress rather than the bag with the biggest litre number. Several of our picks, including the tomtoc and the Vancropak, have compression or expansion features specifically so you can shrink the profile. That flexibility is worth more than an extra five liters of nominal capacity.
What 40 Liters Actually Packs: Trip Length Guide
Forty liters is a real quantity, not a marketing number, but the translation to trip length depends entirely on your packing style. A capsule wardrobe of five tops, three bottoms and one change of underwear per day fits comfortably. A packer who wears one jacket repeatedly and washes underwear in a sink can stretch the same bag to two weeks.
For a three to four day trip, a 40L bag is generous. You will have room for a packing cube you do not strictly need, which is a pleasant problem. Most people in this range use the extra space for a laptop and chargers, or for bulky items like a shoe pair and a jacket that would not compress in a smaller bag.
For a five to seven day trip, which is the sweet spot for 40 liters, you are packing efficiently with cubes and a firm rule about re-wearing. This is where a clamshell-opening bag like the tomtoc or the Topo Global Travel Bag pays off, because the flat layout stops you wasting half the volume on gaps and unused corners.
For ten days or more, 40 liters is possible but demanding, and it is worth asking honestly whether your trip needs a laundry stop. The expandable bags in this list, the Tolaccea and the CROSSGEAR, give you a way to buy capacity when you need it without carrying the extra volume the whole time. The expandable Lumesner does the same, and the expansion zip on the Vancropak adds about 2 inches of width rather than litres. If you would rather split the load across two smaller bags than manage one 40L, our duffel backpack picks cover that approach.
A useful exercise before you buy, borrowed from the r/onebag community, is to lay out everything you would actually bring and then test-fit that pile into whatever bag you already own. It takes an evening and it tells you more than any litre figure on a product page. If the pile fills your current bag completely, you are a 40L person. If there is slack, you would be happier at 35L.
Comfort Features That Matter: Hip Belts, Load Lifters and Sternum Straps
Back comfort is the most common long-haul complaint in travel forums, and the fix is not padding so much as load transfer. A hip belt moves the majority of a bag’s weight from your shoulders onto your pelvis, which is what your skeleton is actually built to carry. In this roundup, only the two Osprey packs have a proper hip belt, and the Tolaccea includes a detachable waist belt.
Load lifters are the smaller adjustment above the shoulder straps that pull the top of the pack closer to your back. They matter most on a structured bag, because they stop the load drifting away from your spine over a long day. Load lifters on a soft unstructured pack do very little, which is why we would not buy a bag solely for them.
A sternum strap closes the gap between your shoulder straps and stops the harness sliding sideways. Every bag in this roundup carries one, and the Thule Landmark adds an integrated whistle, which is a small thing that becomes relevant on a night walk in an unfamiliar city. Adjustable chest straps showed up as a specific request from buyers of the SWICKY, whose three-level strap system is the most adjustable harness here.
Back panel ventilation is the other half of the comfort story. The tomtoc uses a 3D padded back panel, the CROSSGEAR adds a contoured ergonomic panel, and the Lumesner uses multi-panel ventilated padding. On the other side, the Osprey listings are not water resistant, which means a sweat-soaked panel in a humid climate dries slowly, so a pack liner is worth carrying.
Our practical rule: if your typical day involves more than 20 pounds on your back or more than a kilometre of walking, buy the bag with a hip belt and accept the extra empty weight. If you are a short-haul traveller moving between airport, train and hotel, the weight saving on a lighter unstructured pack is the better trade.
Frequently Asked Questions
Is a 40L backpack allowed in a flight?
Usually yes. Most major airlines allow a 40L backpack in the cabin if it fits their size allowance, typically 22 x 14 x 9 inches. Check the published dimensions of any bag against the carrier limit before you book, because some 40L models measure 9.1 inches deep and European carriers allow less. A 40L bag is an overhead-bin item, not a personal item.
Can a 40L backpack fit under an airline seat?
Almost never, once it is packed. Under-seat personal items are typically 18 x 14 x 8 inches or smaller, which is well under 40 liters. The CROSSGEAR in this list is the exception, because it compresses to 30L at 18 x 13.7 x 7 inches and expands to 40L when you need bin space. Otherwise, plan for the overhead bin.
What is the best 40L travel backpack?
The Taygeer 40L is our top overall pick for its nine pockets across three compartments, 17.3 inch laptop sleeve and 0.9 kg weight. The Osprey Farpoint 40L wins for heavy loads thanks to its internal frame and hip belt, and the tomtoc 40L wins on build quality with YKK zippers and recycled fabric. Best value is the Lumesner, which includes four packing cubes.
Can I bring a 40L backpack as a carry-on?
Yes, on most airlines, as long as it fits the cabin size allowance and any weight limit. Watch two things: the depth measurement, since structured bags like the Osprey Farpoint use 9.1 inches before anything is packed, and the weight rule, because some carriers such as Singapore Airlines cap cabin bags near 7kg. Confirm both with your carrier.
What happens if my carry-on bag is one inch too big?
A gate agent will measure it with a sizer, and if it does not fit they will tag it and check it into the hold for free at the gate, which means it travels at the back of the plane. You can refuse and pay to check it at the counter instead. Pull your compression straps tight, tuck loose straps inside, and compress soft panels before you reach the gate.
How long can you travel with a 40L backpack?
For most packing styles, five to seven days is comfortable and three to four days is generous. Ten days or more is possible with capsule packing and laundry access. Try a test fit before you buy: lay out everything you would bring and pack it into a bag you already own, which is the method the r/onebag community recommends.
Do airlines check the weight of carry-on bags?
Some do, and the limit is often lower than you expect. US carriers generally do not weigh cabin bags, but many Asian and European carriers do, with allowances around 7kg or 8kg. A 7kg ceiling is roughly a 30 to 35L bag once packed, so a full 40L bag can fail on weight even when it passes on size. Check the weight rule separately from the size rule.
Which 40L Carry On Backpack Should You Buy?
The Taygeer 40L is the best 40L travel backpack for carry on travel because it organizes better than anything else here and has the deepest owner feedback behind it. If you want more, the Lumesner includes four packing cubes and an expansion zip. If you are walking long distances, the Osprey Farpoint is the only one that transfers weight to your hips properly.
Check your bag against the carrier allowance before you commit, and test-fit your actual gear first. For wider reading, our picks on travel backpacks in general and carry on luggage for international routes cover the cases where 40 liters is not the answer.