Southwest Airlines is the world’s largest low-cost airline. It travels to more than 103 cities in the U.S.—and 9 other countries. Southwest Airlines won several Travelers’ Choice Awards for 2020 from TripAdvisor (among others), such: ● Best Airline North America ● Best Airline United States ● Best Economy North America ● Best Low-Cost Airline North America Southwest Airlines became the United States’ largest domestic air carrier in 2003—and continues to maintain this ranking per the U.S. Department of Transportation's recent report of domestic originating passengers boarded. It flew more than 4,000 weekday departures during the peak travel seasons in 2019—out of 101 destinations in the U.S., plus 10 countries. In 2020, Southwest Airlines added flights to Hilo, Hawaii, and Cozumel, Mexico, making for 103 airports served.