Southwest Airlines CEO Gary Kelly speaks during a preview of the new international concourse at Houston Hobby Airport in Houston in 2015. (AP Photo/Pat Sullivan, File)
Southwest Airlines CEO Gary Kelly speaks during a preview of the new international concourse at Houston Hobby Airport in Houston in 2015. (AP Photo/Pat Sullivan, File) Pat Sullivan AP
Southwest Airlines CEO Gary Kelly speaks during a preview of the new international concourse at Houston Hobby Airport in Houston in 2015. (AP Photo/Pat Sullivan, File) Pat Sullivan AP