Southwest Airlines
- IATA
- WN
- ICAO
- SWA
- Founded
- 1967
- Fleet
- 800
- Destinations
- 120
Southwest Airlines is the world’s largest low-cost carrier and flies an all-Boeing 737 fleet across the United States and near-international markets. In 2025 it ended its famous open-seating model after more than 50 years, introducing assigned seating.