Southwest Airlines Logo – Southwest Airlines Co. is a low-cost airline of the United States . Southwest is the largest airline in the United States by number of domestic passengers carried per year (to December 31, 2007). 7 Southwest, the sixth largest U.S. airline by revenue, 8 holds the second largest fleet of passenger aircraft of all commercial airline in the world. A July 12, 2008, Southwest operated approximately 3,500 daily flights. Southwest is based on the 2702 Love Field Drive in the area of Love Field in Dallas , Texas , adjacent to the airport Love Field .
Southwest Airlines has carried more passengers than any other U.S. airline since August 2006 in domestic and international passenger transport according to statistics from the Department of Transportation United States. October Southwest Airlines is one of the most profitable airlines in the world , following 36 consecutive months of gains in January 2009. Southwest practices a very profitable business model unusual in traditional airlines: fly many short trips, with fast turnarounds at airports secondary (more efficient and less costly) to the big cities and using mainly a single type of aircraft, the Boeing 737 .