Southwest Airlines vs JetBlue — carry-on baggage compared | CabinPax

Carry-on rules side by side: maximum dimensions, weight allowance, personal item. Data updated April 2026.

Southwest Airlines and JetBlue sit in similar segments, which makes the comparison cleaner — what shifts is mostly the dimensional grid and a few details around the personal item.

Southwest Airlines pulls ahead on dimensions (61x41x25 cm versus 55.88x35.56x22.86 cm for JetBlue). When the carry-on is right at the limit, Southwest Airlines keeps the door open while JetBlue closes it.