Backpack and Travel: What Actually Matters When Picking One
What to look for when matching a backpack and travel plans, plus 5 real, verified travel backpacks sized against Ryanair and easyJet cabin-bag limits.
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A backpack built for travel needs to do three things: fit an airline's cabin-bag sizer, carry comfortably on foot for a full day, and pack down small enough for a train's overhead rack. Here's how to match a backpack to a real Europe trip, plus 5 real, verified picks.
The backpack and travel don't always match up
Plenty of "travel backpacks" are built with US flights in mind. They're fine for a domestic carry-on but too deep for Ryanair or easyJet's cabin-bag sizers. If your trip involves a budget carrier in Europe, the backpack you pick needs to answer to those rules first, not the other way around.
The two allowances that matter most in 2026:
- Ryanair Priority cabin bag (paid): 55 x 40 x 20 cm, up to 10 kg, checked at the gate with a metal sizer.
- easyJet large cabin bag (paid): 56 x 45 x 25 cm.
Both airlines also offer a smaller free personal-item allowance (40 x 30 x 20 cm on Ryanair, 45 x 36 x 20 cm on easyJet) that goes under the seat, not overhead. Most "40L" travel backpacks are built for the paid cabin-bag tier, not the free one.
What to check before you buy
Front-to-back size first. Most standard 40L backpacks run 28-31 cm deep. That's over Ryanair's Priority limit (20 cm) and can crowd easyJet's large cabin bag (25 cm) too. Look at the third number in a pack's listed dimensions before anything else.
Weight of the empty pack. A 40L pack that weighs 5 lb empty leaves you less room under a 10 kg cabin-bag weight limit once it's packed. A 3-3.5 lb empty pack gives you more to work with.
How it carries loaded. A hip belt and sternum strap matter more on cobblestones than on flat sidewalks. Uneven stone streets shift weight around, and a pack with just shoulder straps will wear on you by hour three of a walking day.
How it fits into a train rack. European train overhead racks are narrower than a lot of US train and plane bins. A pack with compression straps that cinch the load down packs into that space more easily than one that stays fully expanded.
5 real picks for backpack-and-travel trips
Osprey Farpoint 40 Travel Pack
Weighs about 5.3 lb (2.4 kg) and measures roughly 54-56 x 38-39 x 30-31 cm. It's a clamshell-opening pack with a padded hip belt, load-lifter straps, and a quick-access sleeve for a 16-inch laptop. Good for travelers who want a well-padded carry and don't mind paying for a bigger cabin-bag allowance on Ryanair or easyJet, since its 30+ cm front-to-back size runs over the Priority cabin bag limit.
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Tortuga Travel Backpack Pro (34L)
Weighs 3.6 lb (1.6 kg) and measures 20.5 x 13 x 7.5 in, about 52 x 33 x 19 cm. That front-to-back size fits inside Ryanair's Priority cabin bag limit (55 x 40 x 20 cm) with room left over, and clears easyJet's large cabin bag easily. It opens flat like a suitcase, uses waterproof ECOPAK EPX200 fabric, and has a suspended, fleece-lined sleeve for up to a 16-inch laptop. The hip belt is a separate add-on, worth getting if you're walking with it loaded.
Tortuga Travel Backpack Pro
Nomatic Travel Bag 40L
Weighs about 3.42 lb and measures 21 x 14 x 9 in (roughly 53 x 36 x 23 cm). It converts from a backpack to a duffel, which is nice if your back needs a break between train stations. It fits easyJet's large cabin bag and comes close to Ryanair's Priority allowance, though its 23 cm front-to-back size is a bit over that 20 cm limit. It carries a laptop up to 16 x 10.5 x 1.5 inches and has a dedicated shoe compartment.
Peak Design Travel Backpack 45L
Compresses to a 35L, 56 x 33 x 24 cm profile, or expands to 45L at 56 x 33 x 29 cm. Weighs 4.5 lb (2.05 kg) with a padded 16-inch laptop sleeve. Compressed, it fits within easyJet's large cabin bag dimensions, though its 56 cm length sits right at that ceiling. This is the pick for travelers who want one bag that shrinks for the flight and grows once they're on the ground picking up souvenirs or extra layers.
Peak Design Travel Backpack 45L
REI Co-op Ruckpack 40
A 40L pack measuring 23 x 15 x 9.5 in (about 58 x 38 x 24 cm), weighing 2.81 lb (men's) or 2.69 lb (women's). At 58 cm long, it runs a bit over both Ryanair's Priority and easyJet's large cabin-bag length limits, so it fits best on US domestic flights or carriers with looser carry-on rules. It has a padded laptop compartment and load lifters that help distribute weight during long walking days.
REI Co-op Ruckpack 40
Bottom line
If your trip is mostly budget-carrier flights inside Europe, prioritize front-to-back size under 20-23 cm, like the Tortuga Pro or Osprey Fairview 40 (covered on the hub page). If you're flying carriers with more generous carry-on rules, or checking a bag on at least one leg, the Farpoint 40, Nomatic 40L, or Peak Design 45L give you more room to work with.