The winner has spent billions improving its operations—while navigating a corporate shake-up and revising its strategy.

One U.S. airline far outperformed its rivals last year, according to new rankings from the Wall Street Journal.

Southwest Airlines' change to assigned seating hasn't been an easy one for the company, but investors are starting to love it ...

The airline says its new economic model is critical to catch industry rivals, even if passengers have to pay more.

The airline gave guidance for adjusted earnings per share this year to increase to $4 a share for 2026. That is up from 93 ...