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Alaska Airlines vs United Airlines

Cabin and carry-on baggage limits for Alaska Airlines and United Airlines, side by side.

⚠ These figures are awaiting manual verification against the airline's official page. Treat them as preliminary.

United Airlines allows the larger carry-on — its longest side is 56 cm, versus 55.88 cm for Alaska Airlines.

Check your bag

Enter your bag's dimensions to see how it fares against both airlines' carry-on limits.

optional — leave blank to skip the weight check Leave blank and we report the piece count as not checked — never as passed. Enter it only if you want it compared.

PreliminaryRules marked Preliminary have not yet been manually verified against the airline's official page. They may differ from the airline's actual policy — always confirm with the airline before you fly.

Carry-on compliance check results
Airline Verdict Fits as Margin Checked on Source

Enter your bag's size above to see which airlines accept it.

Max dimensions
55.88 × 35.56 × 22.86 cm
Total linear
114.3 cm total
Weight limit
Not published
Pieces
1
United Airlines UA More room
Max dimensions
56 × 35 × 23 cm
Total linear
Not published
Weight limit
Not published
Pieces
1

Cabin & carry-on allowances

Baggage allowances by fare tier
Allowance Alaska Airlines United Airlines
Carry-on 55.88 × 35.56 × 22.86 cm · 114.3 cm total · Not published · 1 pc including wheels and handle 56 × 35 × 23 cm · Not published · Not published · 1 pc including handle and wheels
Personal item Not directly comparable: the two rows apply under different conditions. Not on record 43 × 25 × 22 cm · Not published · Not published · 1 pc including handle and wheels Must fit under the seat in front of you

Sources

Alaska Airlines

Optional Services and Fees - Alaska Airlines and Hawaiian Airlines (opens in a new window)
Official · unverified Last checked: 2026-10-11

United Airlines

Carry-on Bags (opens in a new window)
Official · unverified Last checked: 2026-10-11

The rules behind these figures

Both sides of this comparison come from these rule pages; open one to see its source excerpt.