Where this rule applies
Southwest-operated flights; partner-airline segments are excluded from this allowance.
Source update: Not stated.
Recorded bag limits
| Bag / allowance | Published limit | Condition |
|---|---|---|
| Carry-on bag | 24 × 16 × 10 in | <= |
Southwest says oversized/additional items should be checked at the ticket counter before the departure gate.
Before leaving
- Open the official source and check your route, ticket, event or exhibition.
- Measure your bag when packed, including protruding pockets and other parts counted by the operator.
- Check the number of bags, material or transparency requirements, and any storage conditions.
- Ask the operator about exceptions and accessibility or medical needs when relevant.
Passing a numerical size check does not confirm boarding or admission. Event-specific rules, staffing and available storage can change the outcome.
Official sources
- Southwest carry-on and personal item official policy ↗Checked 2026-10-15