Southwest Airlines Carry-On Size, Weight & Fees (2026)
Southwest Airlines's carry-on limit is 24 x 16 x 10 (61 x 41 x 25), including wheels and handles. Weight limit: No published weight limit. You can also bring one personal item up to under-seat item (no separate published max; must fit under seat). Southwest Airlines includes a free carry-on on Basic Economy.
| Dimensions (in) | Dimensions (cm) | Weight limit | Fee | |
|---|---|---|---|---|
| Carry-on bag | 24 x 16 x 10 | 61 x 41 x 25 | No published weight limit | Free (carry-on included) |
| Personal item | under-seat item (no separate published max; must fit under seat) | — | — | free |
Does Southwest Airlines charge for a carry-on?
Free — carry-on included on all fares. Checked bags may incur fees on Basic, Choice, and Choice Preferred fares.
Basic economy: what you can and can't bring
All Southwest fares include one free carry-on and one personal item. Basic fare seats are assigned at check-in (assigned seating from Jan 27, 2026).
2026 policy note: Southwest moved to assigned seating for all flights from January 27, 2026; free carry-on policy retained per official baggage policy.
If your bag is too big at the gate
Wheels, handles, and attachments count toward the 24 x 16 x 10 in limit.
How Southwest Airlines compares
See carry-on rules for Alaska Airlines, Allegiant Air, American Airlines — dimensions, basic-economy rules, and fees differ airline by airline.
Frequently asked questions
What is Southwest Airlines's carry-on size?
24 x 16 x 10 (61 x 41 x 25), including wheels and handles.
Does Southwest Airlines have a carry-on weight limit?
No published weight limit
Can I bring a carry-on on Southwest Airlines basic economy?
All Southwest fares include one free carry-on and one personal item. Basic fare seats are assigned at check-in (assigned seating from Jan 27, 2026).
How much is Southwest Airlines's carry-on or gate-check fee?
Free — carry-on included on all fares. Checked bags may incur fees on Basic, Choice, and Choice Preferred fares.