More: US air carriers receiving approval for flights to Cuba are American Airlines, Frontier Airlines, JetBlue Airways, Silver Airways, Southwest Airlines, and Sun Country Airlines; flights will leave from Miami, Fort Lauderdale, Chicago, Philadelphia, and Minneapolis/St. Paul - US Dept. of Transportation
Southwest Airlines Co. (NYSE: LUV) is a major U.S. airline, the world's largest low-cost carrier, headquartered in Dallas, Texas. The airline was established in 1967 by Herb Kelleher and adopted its current name (Southwest Airlines) in 1971. The airline has nearly 46,000 employees as of December 2014 and operates more than 3,800 flights per day. As of 2014, it carried the most domestic passengers of any U.S. airline. As of June 2016, Southwest Airlines has scheduled services to 97 destinations in 40 states, Puerto Rico, and abroad.
Southwest Airlines has used only Boeing 737s, except for several years in the 1970s, and 1980s, when it leased some Boeing 727s from Braniff International Airways. As of January 2016, Southwest is the largest operator of the Boeing 737 worldwide, with over 700 in service, each averaging six flights per day.