Southwest

Allowed dimensions: 60.96x40.64x25.4 cm

The context in a few words

Operating out of Dominique, Southwest runs a regional network that values consistency over global reach. Carry-on policy stays within a familiar bracket, with neither generous extras nor unusual restrictions.

60.96x40.64x25.4 cm is above the market average. Worth noting if you travel with a 40-50 L backpack or an extended cabin case.

One useful benchmark: on Southwest, cabin baggage typically fits the overhead bin of an Airbus A320 or Boeing 737, the most common types on their network. The 60.96x40.64x25.4 cm format matches standard bin dimensions, no more. Even seemingly compatible extended cases are best avoided.

Practical advice: on regional flights, the trick is to travel with an in-between format — large enough for a few days' essentials, compact enough for the smaller bins of regional aircraft.

Southwest doesn't communicate clearly on the additional personal item. Counter experience favours a small handbag; beyond that, check with the agent or consolidate in the main suitcase to avoid boarding refusal.

Which bag for Southwest?

Across Southwest's network, what matters is consistency between the case and the published rules. The cases below are sized to clear without dispute.