Everything You Need to Know About Southwest's Carry-On Size Allowance

Southwest accepts one carry-on per guest that fits in the sizer: 10×16×24 inches (including wheels and handles).

There’s no published weight limit, but you must lift your bag into the overhead bin unassisted.

One carry-on and one personal item travel free on all Southwest flights—no baggage fees for these items.

Items such as purses, briefcases, or laptop bags that fit under the seat (maximum dimensions: 18×8×14 inches) count as your personal item.

Oversized or excess bags are gate-checked; you may wait for baggage claim, and could incur checked-bag fees.

No sharp objects, flammable materials, or liquids over 3.4 oz (100 ml). Comply with TSA rules for security screening.

Overhead space is claimed by boarding groups A1–A30 first, then B, then C. Earlier boarding boosts your chances of bin space.