What size is a personal item on Alaska?

Alaska doesn't publish one. It must fit under the seat; about 17 x 13 x 6 inches is the commonly cited fit.

Is a backpack a personal item on Alaska?

Yes, if it fits within 17 x 13 x 6 inches and under the seat. Measure it packed, with straps and pockets.

Alaska personal item size checker

Alaska publishes no official personal item size; it just has to fit under the seat, and about 17 x 13 x 6 inches is the commonly cited fit. A carry-on can be up to 22 x 14 x 9 inches and is free on most fares.

Checked October 2026. See the full Alaska bag fees and rules.

Quick answers

What size is a personal item on Alaska?: Alaska doesn't publish one. It must fit under the seat; about 17 x 13 x 6 inches is the commonly cited fit.
What size carry-on does Alaska allow?: Up to 22 x 14 x 9 inches.
Is a backpack a personal item on Alaska?: Yes, if it fits within 17 x 13 x 6 inches and under the seat. Measure it packed, with straps and pockets.

Other airlines: Frontier, United, American, Allegiant, Southwest, JetBlue, Delta.