Does the Peak Design Travel Backpack 45L fit British Airways' cabin bag?

Yes, just. Exactly the limit on at least one side. A bulging pocket would push it over. It's too big for British Airways' personal item (16 cm too long).

Tight fit

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Side the bag fails onPart that sticks outSizer frame

Tight fit

Exactly the limit on at least one side. A bulging pocket would push it over.

BagPeak Design Travel Backpack 45L

Cabin bagBritish Airways

Length: 56of 56 cmExact fit
Width: 33of 45 cm12 cm spare
Depth: 23of 25 cm2 cm spare

Weight23 kg limit

Packed weightkg

Empty it weighs 2 kg, leaving 21 kg for your things.

What you can do

Pack it before you measure. A full pocket can add 3 to 5 cm.
Fits 4 other airlines, including Singapore Airlines and Frontier Airlines. See all

We haven't checked this bag's size against the brand yet.

See bags that fit British Airways

British Airways rules checked 2 Nov 2026. Source. Sizes include wheels and handles.

Side by side

Peak Design Travel Backpack 45L against British Airways' limits. Bags can be turned, so the longest side is compared with the longest limit.

Cabin bag: 56 × 45 × 25 cm, 23 kg
Side	Bag	Limit	Result
Length	56 cm	56 cm	Exact
Width	33 cm	45 cm	12 cm spare
Depth	23 cm	25 cm	2 cm spare

Personal item: 40 × 30 × 15 cm, 23 kg
Side	Bag	Limit	Result
Length	56 cm	40 cm	16 cm over
Width	33 cm	30 cm	3 cm over
Depth	23 cm	15 cm	8 cm over

Empty it weighs 2 kg of the 23 kg limit.

British Airways rules worth knowing

Personal item: Handbag or laptop bag.
Both bags are included on every fare, up to 23 kg each, as long as you can lift them into the bin yourself.

Airlines where the Peak Design Travel Backpack 45L fits

Singapore Airlines Frontier Airlines Southwest Airlines AirAsia All airlines

Bags that fit British Airways' cabin bag

Biggest first.

Rimowa Essential Cabin55 × 39 × 23 cmTight1 cm to spareBag page
Away Carry-On55.1 × 36.6 × 22.9 cmTight0.9 cm to spareBag page
Osprey Farpoint 4055.1 × 35.1 × 23.1 cmTight0.9 cm to spareBag page
American Tourister Soundbox Spinner 5555 × 40 × 20 cmTight1 cm to spareBag page

Good to know

Will the Peak Design Travel Backpack 45L still fit British Airways when it's packed?

Only just. Keep the front pockets flat and the expansion zip closed, and measure it packed before you leave.

What is British Airways' cabin bag size limit?

British Airways' cabin bag limit is 56 × 45 × 25 cm, up to 23 kg.

Which other bags fit British Airways?

Rimowa Essential Cabin, Away Carry-On, Osprey Farpoint 40 and American Tourister Soundbox Spinner 55 are right on the limit, so don't overpack.