Southwest Airlines Co. may be at risk of a comment letter from the Securities and Exchange Commission after including adjusted revenue in its fourth-quarter earnings report published early Thursday.

A downbeat outlook tarnished an otherwise strong quarter for Southwest, which topped profit estimates on robust holiday travel.

Southwest Airlines said Thursday it swung to a fourth-quarter profit of 42 cents a share from a year-ago loss of 42 cents a share, as overall expenses fell on lower fuel costs. Southwest’s stock fell ...

Southwest Airlines reported a fourth-quarter profit of 56 cents per share, beating Wall Street's expectation of 44 cents.

Southwest Airlines Co. reported a quarterly profit higher than analysts expected as leisure travel over the winter holidays ...

Southwest Airlines posted a profit in the fourth quarter as bookings during the holidays were better than expected.

Southwest Airlines added 31 new flights for the Super Bowl in New Orleans with most tickets costing more than $500, while ...