Southwest Airlines (WN/SWA) is the world’s largest low-cost carrier and one of the major airlines in the United States. Southwest is the largest operator of the Boeing 737 worldwide with 735 currently in operation. The airline currently serves over 120 destinations from eleven main hubs including Atlanta, Baltimore, Chicago, Dallas, Denver, Houston, Las Vegas, Los Angeles, Oakland, Orlando and Phoenix.

Headquarters: Dallas, Texas, U.S.