What Happens If My Carry-On Is Too Big?
On legacy carriers (Delta, United, American, Alaska, Southwest): your bag gets gate-checked for free. On budget carriers (Frontier, JetBlue Blue Basic): you may be charged up to $99 at the gate.
| Airline | If Too Big at Gate |
|---|---|
| Delta, Southwest, Alaska | Free gate-check |
| United, American (Economy+) | Free gate-check |
| United, American (Basic Economy) | Up to $65 fee |
| JetBlue (Blue Basic) | $45–$65 fee |
| Frontier | Up to $99 fee |
Tip: Measure your bag before you fly. Soft-sided bags near the limit usually pass; rigid bags that exceed the gauge do not.
Related: Carry-On Size Checker · Baggage Rules by Airline