Is a 40L travel backpack carry-on size?

Usually yes for US airlines when packed without overstuffing, since most 40 liter travel packs are designed around the common 22 x 14 x 9 inch guideline. European budget carriers can be stricter. Compare the dimensions on the Amazon listing with your airline before you fly.

Travel backpack or rolling carry-on: which is better?

Backpacks win on stairs, cobblestones, buses and crowded trains, and they leave your hands free. Rolling bags win when you walk long terminal distances with a heavy load or have back issues. Many travelers end up owning one of each for different trips.

How much weight can I carry comfortably in a travel backpack?

A common rule is to keep a loaded pack well under a fifth of your body weight for all-day comfort. A full 40 liter pack of clothes and a laptop can approach that for lighter travelers, which is why a hip belt and a disciplined packing list matter.

Buying guide · updated for 2026

Best Travel Backpack (2026)

A travel backpack replaces a rolling bag for trips where you walk, climb stairs or hop between trains. We looked at clamshell openings, harness comfort and carry-on compliance, and kept four picks that cover every style of traveler.

4 picks · compare in under 2 minutes · how we pick

Our picks

Best Overall

Osprey Farpoint 40

Best for: Carry-on-only travelers walking between stations, hostels and hotels on week-long trips

Hiking-grade harness with hip belt and sternum strap
Clamshell opening with compression straps
Heavy on smaller frames when fully loaded

About $255Check price

MATEIN 40L expandable carry-on backpack with laptop compartment unzipped on a bed

Best Value

MATEIN Carry-On Expandable

Best for: Budget travelers and students on short weekend flights who want maximum features for minimum money

Lowest price here for a laptop-ready 40L pack
Shoe compartment and organizer pockets included
No hip belt, so heavy loads tire shoulders quickly

About $30Check price

Trending Now

Peak Design Travel Backpack 45L

Best for: Photographers and tech-heavy travelers who want one pack for flights and daily shooting

Best modular system for camera and tech travel
Expands and compresses to match the trip
Heavy empty, and over carry-on size when fully expanded

About $229Check price

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Tortuga Travel Backpack

Best for: Digital nomads and long-haul one-bag travelers carrying full loads for long distances

Most comfortable harness among these four picks
Designed by a brand focused only on carry-on backpacks
Expensive compared with mainstream travel packs

About $350Check price

Decide in 2 minutes

Who each pick is for, its main selling point, the reason you might skip it and the price.

Pick	Product	Best for	Main selling point	Potential drawback	Price
Best OverallTravel Backpacks	Osprey Farpoint 40	Carry-on-only travelers walking between stations, hostels and hotels on week-long trips	The Osprey Farpoint 40 is the travel backpack that turned a generation of flyers into carry-on-only converts: a real hiking harness with a hip belt, a wide clamshell opening and a size that stays inside most airline limi	Heavy on smaller frames when fully loaded	About $255
Best ValueTravel Backpacks	MATEIN Carry-On Expandable	Budget travelers and students on short weekend flights who want maximum features for minimum money	The MATEIN carry-on backpack delivers the feature list of packs costing far more: 40L capacity, expansion zipper, laptop compartment, shoe pocket and a USB pass-through, all for the price of a nice dinner.	No hip belt, so heavy loads tire shoulders quickly	About $30
Trending NowTravel Backpacks	Peak Design Travel Backpack 45L	Photographers and tech-heavy travelers who want one pack for flights and daily shooting	The Peak Design Travel Backpack 45L is a modular system more than a bag: it compresses down for daily use, expands to full size for long trips and swallows Peak Design's camera and packing cubes for photographers and tec	Heavy empty, and over carry-on size when fully expanded	About $229
Go PremiumTravel Backpacks	Tortuga Travel Backpack	Digital nomads and long-haul one-bag travelers carrying full loads for long distances	The Tortuga Travel Backpack is purpose-built for living out of one bag: an adjustable hiking-style harness, a full suitcase-style opening, a dedicated laptop compartment and a shape that sits inside carry-on limits by de	Expensive compared with mainstream travel packs	About $350

How to choose

Clamshell opening lets you pack like a suitcase instead of digging from the top.
A padded hip belt moves weight off your shoulders on long walks.
Check the laptop sleeve fits your machine; not every pack takes a 16 inch.
Stowable straps keep the harness clean if the bag ever gets checked.
Around 40 liters is the practical ceiling for most airline carry-on rules.
Lighter packs leave more of your weight allowance for clothes.
Loaded weight matters more than capacity for smaller travelers.

Watch out: A loaded 35 to 42 L backpack can feel heavy for smaller travelers.

Frequently asked questions

Is a 40L travel backpack carry-on size?: Usually yes for US airlines when packed without overstuffing, since most 40 liter travel packs are designed around the common 22 x 14 x 9 inch guideline. European budget carriers can be stricter. Compare the dimensions on the Amazon listing with your airline before you fly.
Travel backpack or rolling carry-on: which is better?: Backpacks win on stairs, cobblestones, buses and crowded trains, and they leave your hands free. Rolling bags win when you walk long terminal distances with a heavy load or have back issues. Many travelers end up owning one of each for different trips.
How much weight can I carry comfortably in a travel backpack?: A common rule is to keep a loaded pack well under a fifth of your body weight for all-day comfort. A full 40 liter pack of clothes and a laptop can approach that for lighter travelers, which is why a hip belt and a disciplined packing list matter.

Explore the full rankings

Every pick on this page comes from one of these comparisons.