Southwest Airlines Boeing 737-500

Southwest Airlines Boeing 737-5H4, N503SW, is shown arriving at Tulsa on July 14, 2005.

(Photo credit: Danny Fritsche)

Southwest Airlines Boeing 737-5H4, N527SW, is shown departing Tulsa in August 2006 wearing the carrier’s 2001-indtroduced livery.

(Photo credit: Danny Fritsche)