The 450th Expeditionary Flying Training Squadron (450 EFTS) is a provisional United States Air Force unit assigned to the 322d Air Expeditionary Group. In 2008 it was converted to an expeditionary unit on provisional status for activation by Air Combat Command any time after 28 October 2008. Its current status is undetermined. The squadron most recently was assigned to the 323d Flying Training Wing based at Mather Air Force Base, California. It operated T-37 Tweet and T-43 Bobcat aircraft conducting flight training for members of the United States military and foreign allies.