GateSizer

Does the Peak Design Travel Backpack 45L fit Delta Air Lines' carry-on?

No. Too deep by 0.1 cm. It's 23 cm front to back and Delta Air Lines allows 22.9 cm. It's too big for Delta Air Lines' personal item (No size published).

Won't fit

Flying with
55.9 × 35.6 × 22.9 cm
Checking
56 × 33 × 23 cm, backpack
Units
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Side the bag fails onPart that sticks outSizer frame

Won't fit

Too deep by 0.1 cm. It's 23 cm front to back and Delta Air Lines allows 22.9 cm.

BagPeak Design Travel Backpack 45L
Cabin bagDelta Air Lines
Length
56of 55.9 cm0.1 cm over
Width
33of 35.6 cm2.6 cm spare
Depth
23of 22.9 cm0.1 cm over
WeightNo published limit on Delta Air Lines

Gate staff can still refuse a bag you can't lift into the bin yourself.

What you can do

  • Take a bag 55.9 cm tall or less. 3 bags we list fit.
  • Or check it in when you book. It's usually cheaper than paying at the gate.
  • 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 Delta Air Lines

Delta Air Lines rules checked 2 Nov 2026. Airline's page. Sizes include wheels and handles.

Side by side

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

Carry-on: 55.9 × 35.6 × 22.9 cm
SideBagLimitResult
Length56 cm55.9 cm0.1 cm over
Width33 cm35.6 cm2.6 cm spare
Depth23 cm22.9 cm0.1 cm over

Delta Air Lines rules worth knowing

  • Carry-on: 22 × 14 × 9 in including wheels and handles. Included even on Basic Economy.
  • Personal item: Delta doesn't publish a size. It just has to fit under the seat: a purse, laptop bag or small backpack.
  • No published carry-on weight limit.
  • Regional jets with under 50 seats may valet-check carry-ons.

Airlines where the Peak Design Travel Backpack 45L fits

Singapore AirlinesFrontier AirlinesSouthwest AirlinesAirAsiaAll airlines

Bags that fit Delta Air Lines' carry-on

Biggest first.

Good to know

What can I do if the Peak Design Travel Backpack 45L is too big for Delta Air Lines?

Add a checked bag when you book, which is usually cheaper than paying at the gate, or bring a smaller carry-on. The Peak Design Travel Backpack 45L does fit Singapore Airlines, Frontier Airlines and Southwest Airlines.

What is Delta Air Lines' carry-on size limit?

Delta Air Lines' carry-on limit is 55.9 × 35.6 × 22.9 cm, with no published weight limit.

Which other bags fit Delta Air Lines?

CabinZero Classic 36L, WANDF Personal Item Duffel and Horizn Studios Gion Shoulder Bag fit with room to spare.