United Airlines vs American Airlines baggage rules

United States

A source-backed comparison of United Airlines and American Airlines personal item and carry-on limits, fare conditions and weight rules.

Quick verdict

Neither airline is universally more generous; the answer changes by item or by edge.

Personal item and carry-on side by side

Bag typeUnited AirlinesAmerican AirlinesDimensional result
Personal Item

43 x 25 x 22 cm

Weight not listed

Included · Standard

45 x 35 x 20 cm

Weight not listed

Included · All cabins

Neither airline is universally more generous; the answer changes by item or by edge.
Carry-on

56 x 35 x 23 cm

Weight not listed

Check fare conditions · Standard; Basic Economy depends on route and benefits

55 x 35 x 22 cm

Weight not listed

Included · All cabins

United Airlines is dimensionally more generous; American Airlines is stricter for this bag type. United Airlines's published frame contains American Airlines's listed size.

Source match date

Source checked

Published dimensions were matched to the source within four months; verify ticket and weight conditions before travel.

Source match date Aug 7, 2026

Relative published size frames

Personal Item

United Airlines43 x 25 x 22 cm
American Airlines45 x 35 x 20 cm

Carry-on

United Airlines56 x 35 x 23 cm
American Airlines55 x 35 x 22 cm

Bar area is a simple volume comparison for orientation only. Airline sizers enforce each edge separately; volume alone cannot prove that a bag fits.

Official policy sources

Explore the published size limits

Common questions before you pack

Neither airline is universally more generous; the answer changes by item or by edge. Compare both rows because personal-item and overhead-bag results can differ. Fare and weight rules remain separate from dimensions.

Possibly, but only if every packed edge fits both airlines' current limit and your fares include that item. Use the prefilled comparison, then verify both official sources.

Not necessarily. Inclusion can depend on the fare, route, cabin or add-on even when the dimensions fit. The table shows the published inclusion status; your ticket controls the final allowance.