Southwest Airlines Co. is an American low-cost airline based in Dallas, Texas. Southwest is the largest airline in the United States, based upon domestic passengers carried, . Southwest operates more than 3,400 flights a day, , utilizing a fleet of 552 aircraft.
Southwest Airlines traces its roots to the March 15, 1967 incorporation of Air Southwest Co. by Rollin King

Rollin King

Rollin W. King is a co-founder and former Director of Southwest Airlines.- Background :Rollin W. King was the Founder and first President of Southwest Airlines Co.and the only Director to serve from 1968 for the next 40 years until his retirement at age 75. He served on the Executive Committee and...

 and Herb Kelleher

Herb Kelleher

Herbert D. Kelleher is the co-founder, Chairman Emeritus, and former CEO of Southwest Airlines .-Life and career:...

 to provide service within the state of Texas.
Kelleher believed that by providing intrastate service within Texas, the airline could avoid federal regulation.