In 1971,Rollin King and Herb Kelleher started an airline service with one simple notion " If you get your passengers to their destanations when they want to get there,ontime,at the lowest possible fares ,and make darm sure they have a good time doing it,people will fly your airline" They were rihgt about that. Southwest Airlines is now among the four largest airlines in the United States.Southwest currently has the lowest operating-cost structure in the US domestic airline industry and consistently offers the lowest and most of all simplest fares.Southwest holds the best cumulative customer satistaction record for the past 18years.In December 2008, the airline had 35,499 employees and generated total operating revenues of$11 billion (2007 = $ 9.8 billion,2001=$ 5.3 billion ) from a passenger load factor of 71.2% with a fleet of 537 Boeing 737's. Its stock exchange symbol is 'LUV',represevting Southwest's home at Dallas Love Field,as well as the theme of its employee and customer relationships.