Best 40L Travel Backpacks for Carry-On Travel (2026)

A 40L backpack is the sweet spot for carry-on travel: large enough for a week-long trip if you pack efficiently, small enough to fit in overhead bins on most airlines. The challenge is that 40L comes in many shapes, and some bags are dramatically more airline-friendly than others even at the same volume.

This guide covers the five best 40L travel backpacks for 2026, with honest sizing information for different airline tiers — from full-service carriers to the strictest budget airlines.

Why 40L?

The math works out. Most full-service airlines allow a carry-on of 55×40×23 cm or similar. A well-designed 40L backpack fits within these dimensions. A 50L+ bag usually doesn't.

Versus rolling luggage. Backpacks navigate stairs, cobblestones, and overhead bins more flexibly than spinners. You're not dependent on flat surfaces. The trade-off is weight on your back for airport walks.

The budget airline problem. Budget carriers like Ryanair (55×40×20 cm) or Vueling (55×35×20 cm) enforce tighter limits. Not every 40L backpack passes. We've noted compliance for each pick below.

What to look for

Dimensions first, volume second. A 45L bag shaped like a flat panel can be more airline-friendly than a 38L bag with a thick base. Always check the measurements, not just the litre count.

Panel-loader vs top-loader. Panel loaders (clamshell opening like a suitcase) are far easier to pack and unpack. Top-loaders require emptying the bag to reach items at the bottom.

Hip belt. Useful for hiking; dead weight at the airport. Look for bags where the hip belt detaches or stows.

Laptop access. A dedicated external laptop sleeve (not inside the main compartment) speeds up security screening.

Weight. Aim for under 1.5 kg empty. Heavier harnesses eat into your airline allowance.

Our top picks

1. Osprey Farpoint 40 — Best all-around

Dimensions: 55×34×22 cm | Weight: 1.5 kg | Volume: 40L

The Farpoint 40 has been the go-to travel backpack for years for good reason. The harness and hip belt stow behind a zippered panel so it looks like a duffel at check-in, the panel-loader clamshell opening makes packing easy, and a detachable 13L daypack can be used as a personal item on flights.

Airline compliance:

Full-service (BA, Lufthansa, Air France): passes at 55×34×22 cm
easyJet / Jet2: passes
Ryanair Priority (55×40×20 cm): passes in depth at 22 cm; daypack must be stored inside or checked
Scoot / IndiGo (7 kg limit): tight but possible if packed light

Pros:

Stowable harness avoids belt/loop charges
Included daypack functions as personal item
AllMighty Guarantee from Osprey

Cons:

1.5 kg is heavier than panel-loader rivals
Hip belt is basic — not suitable for trekking

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2. Peak Design Travel Backpack 45L — Best premium option

Dimensions: 55×35×22.9 cm (compressed) | Weight: 1.8 kg | Volume: 30–45L

The Peak Design is the best-engineered travel backpack on the market — and the most expensive. Its unique origami compression system collapses the bag from 45L to 30L, making it viable on strict budget carriers. The MagLatch closure opens the entire bag at once, and the internal organisation is exceptional.

Airline compliance:

Full-service: easily passes at 55×35×23 cm compressed
easyJet: passes
Ryanair Priority: compressed to 30L, depth drops to ~18 cm — likely passes
Scoot / AirAsia (7 kg): weight is the issue at 1.8 kg empty

Pros:

Compresses from 45L to 30L to fit stricter gauges
MagLatch allows one-handed full opening
Camera cube accessories available for photographers
Weatherproof 400D nylon shell

Cons:

Most expensive option at this size
1.8 kg empty is heavy
Complex compression can feel fiddly

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3. Tortuga Setout 45L — Best for tall travellers

Dimensions: 55×35×22 cm | Weight: 1.5 kg | Volume: 45L

Tortuga builds bags specifically around airline carry-on limits. The Setout 45L is built to the maximum dimensions that full-service airlines allow, squeezing maximum volume into a compliant frame. A full clamshell opening, internal organisation, and a padded laptop pocket up to 17 inches make it the most suitcase-like backpack in this guide.

Airline compliance:

Full-service: passes (designed to exactly those limits)
easyJet: passes
Ryanair Priority: the 45L depth of 22 cm is fine; the width of 35 cm is within 40 cm limit — passes
Budget Asian carriers: 7 kg is the challenge

Pros:

45L in a fully compliant form factor
17-inch laptop sleeve — largest in this guide
Hip belt stows in a dedicated pocket
Lockable zippers

Cons:

No daypack or modular system
Pricier than the Osprey
Slightly less refined harness than Osprey or Gregory

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4. Gregory Tetrad 40 — Best value

Dimensions: 53×33×22 cm | Weight: 1.2 kg | Volume: 40L

Gregory is primarily a hiking brand, and the Tetrad 40 brings hiking-quality harness engineering to travel. At 1.2 kg it's the lightest harness-equipped bag on this list, which helps on strict weight carriers. The clamshell opening is full-width and the internal layout is clean.

Airline compliance:

Full-service: passes at 53×33×22 cm
easyJet: passes
Ryanair Priority: passes at all dimensions
Scoot / IndiGo: 1.2 kg empty gives the most headroom for contents of any bag here

Pros:

1.2 kg — lightest fully-featured option on this list
Excellent harness for actual carrying comfort
Good price for the quality level
Clamshell opening

Cons:

No hip belt stow pocket — must detach entirely
Laptop sleeve is internal, not external
Less brand cachet than Osprey or Peak Design

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5. WANDRD TRANSIT 45L — Best for photographers and digital nomads

Dimensions: 56×34×22 cm | Weight: 1.8 kg | Volume: 45L

The TRANSIT is designed for the photographer-traveller who needs camera gear access without sacrificing packing capacity. A full-height side access panel reaches the camera cube (sold separately). The build quality is exceptional — weatherproof Kodra nylon with YKK zippers throughout.

Airline compliance:

Full-service (55×40×23 cm limit): passes at most carriers; 56 cm height is at the boundary — check your specific airline
easyJet: at 56 cm height, just over the 55 cm limit — risk of rejection
Ryanair Priority: 56 cm height is over the 55 cm Ryanair limit — not recommended
US carriers (56×35×22 cm): typically passes

Pros:

Side camera access without unpacking
Compatible with WANDRD accessory ecosystem
Best-in-class build quality and weatherproofing
45L of usable space with clever organisation

Cons:

56 cm height causes issues with strict 55 cm carriers
Expensive
Camera cubes add significant weight and cost

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Note: Placeholder ASIN — verify the listing before purchasing.

Compliance summary table

Bag	Full-service	easyJet	Ryanair Priority	7 kg carriers
Osprey Farpoint 40	Pass	Pass	Pass	Tight
Peak Design 45L	Pass	Pass	Pass (compressed)	Heavy empty
Tortuga Setout 45L	Pass	Pass	Pass	Tight
Gregory Tetrad 40	Pass	Pass	Pass	Best option
WANDRD TRANSIT 45L	Pass	Risk	Fail	Heavy empty

Use the CarrySizer bag fit checker to test your specific bag against your specific airline before you fly.

Packing a 40L bag for a week

A 40L bag packed with intention fits a week of warm-weather travel or 4–5 days of cooler-climate travel. Key strategies:

Use compression cubes — 2 medium Eagle Creek cubes can compress a week of clothes significantly
Wear your heaviest items — jeans, boots, and a jacket on your body rather than in the bag
Digital toiletries — solid shampoo, conditioner bars, and a single multi-purpose moisturiser eliminate most liquid volume
Thin packing layers — merino wool is the traveller's friend: warm, light, odour-resistant, quick-dry

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