Southwest Airlines announced which two cities will get St. Thomas, U.S. Virgin Islands service, and is bringing back dozens of leisure routes for the winter.

Southwest Airlines is one of the largest and most recognizable airlines in the United States, competing with Delta, United, and American in a number of key metrics. However, there is one somewhat surprising way Southwest has never even tried to compete with the other three major airlines.

A Southwest Airlines jet heading to Las Vegas from Southern California took a dramatic plunge shortly after take off in response to an alert about a nearby plane, sending some passengers flying out of their seats and injuring two flight attendants.