Frontier personal item size checker

Frontier's free personal item can be up to 18 x 14 x 8 inches, including wheels and handles. A carry-on can be up to 24 x 16 x 10 inches and costs extra.

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

Heads up: Frontier checks personal items at the gate, and gate agents earn a bonus for catching oversized bags. A bag that doesn't fit the sizer can cost around $100 at the gate.

Quick answers

What size is a personal item on Frontier?

Up to 18 x 14 x 8 inches, including wheels and handles.

What size carry-on does Frontier allow?

Up to 24 x 16 x 10 inches. Carry-ons cost extra on Frontier.

Is a backpack a personal item on Frontier?

Yes, if it fits within 18 x 14 x 8 inches and under the seat. Measure it packed, with straps and pockets.

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