This March 13, 2010 photo, shows a Southwest Airlines plane in Burbank, 

This March 13, 2010 photo, shows a Southwest Airlines plane in Burbank, Calif. Southwest Airlines Co. reports quarterly financial results before the market open on Thursday, April 25, 2013. (AP Photo/Paul Sakuma)
Associated Press
This March 13, 2010 photo, shows a Southwest Airlines plane in Burbank, Calif. Southwest Airlines Co. reports quarterly financial results before the market open on Thursday, April 25, 2013. (AP Photo/Paul Sakuma)
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