boeing 737-3h4

California OneSouthwest Airlines, Inc. is a low fare airline based in Dallas, Texas. It is the largest airline in the United States by number of passengers carried domestically for any one year and the third largest airline in the world by number of passengers carried. Southwest Airlines carried more customers than any other U.S. airline in August 2006, marking it the first time that Southwest Airlines has topped the monthly list for combined domestic and international passengers, according to the U.S. Department of Transportation’s Bureau of Transportation Statistics. Southwest Airlines is one of the industry's most profitable airlines and in January 2007, posted a profit for the 34th consecutive year. Its reputation for low prices and a laid-back atmosphere have made it an icon of pop culture.

The 737-300 was the first major overhaul of the 737 platform, incorporating a host of new improvements while also retaining commonality with previous 737. The -300 was launched in 1980 by USAir and Southwest Airlines, becoming the base model of the 737 Classic series. The 300 series remained in production until the late 90s with the last unit being delivered to Air New Zealand on December 17, 1999.