In this photo taken Friday, June 25, 2010, passengers traveling on Southwest Airlines watch as one plane waits to takeoff and another lands at Midway Airport in Chicago. Southwest Airlines Co. added an upbeat note to a strong quarter for the airline industry on Thursday, July 29, 2010, by reporting a $112 million profit for spring and early summer. (AP Photo/Charles Rex Arbogast)

Photo by: Charles Rex Arbogast

In this photo taken Friday, June 25, 2010, passengers traveling on Southwest Airlines watch as one plane waits to takeoff and another lands at Midway Airport in Chicago. Southwest Airlines Co. added an upbeat note to a strong quarter for the airline industry on Thursday, July 29, 2010, by reporting a $112 million profit for spring and early summer. (AP Photo/Charles Rex Arbogast)