Southwest Airlines

Allowed dimensions: 61x41x25 cm

The context in a few words

A mid-size airline based in Porto Rico, Southwest Airlines runs a regional network rather than a continent-spanning one. On carry-on rules, the grid is straightforward — no major traps if you respect the published dimensions.

The numbers speak for themselves: 61x41x25 cm. That's broader than the segment average, which leaves real room for longer trips without checked luggage.

For quick comparison: the IATA reference grid is 56×36×23 cm at 7 kg. Southwest Airlines sits around 61x41x25 cm — that benchmark anticipates cabin allowance. Any bag over by more than a centimetre risks rerouting to the hold.

At boarding, checks are usually human and reasonable, but regional aircraft are less forgiving on size. A well-proportioned cabin bag beats an oversized one that ends up gate-checked at the bottom of the jet bridge.

Southwest Airlines 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 Airlines?

On Southwest Airlines, the cabin allowance leaves a bit of breathing room — but only if you start from a properly sized case. The picks below cover the formats that work cleanly with the published grid (61x41x25 cm).