Southwest Airlines Co. (NYSE: LUV) is a major U.S. airline and 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 carries the most domestic passengers of any U.S. airline. As of November 2015, Southwest Airlines has scheduled service 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. As of August 2012, Southwest is the largest operator of the Boeing 737 worldwide, with over 650 in service, each averaging six flights per day.
The top sectors served by Southwest Airlines are Los Angeles to New York with 111 lights on a weekly basis, Melbourne to Sydney with 155 weekly flights, Sydney to Melbourne which has 165 flights weekly and Koh Samui to Bangkok with a total of 133 flights on a weekly basis. They also operate occasional flights from Casablanca to Oujda and Gold Coast to Canberra.