Donald James Matthew Blakeslee (September 11, 1917 – September 3, 2008) was an officer in the United States Air Force, whose aviation career began as a pilot in the Royal Canadian Air Force flying Spitfire fighter aircraft during World War II. He then became a member of the Royal Air Force Eagle Squadrons, before transferring to the United States Army Air Forces in 1942. He flew more combat missions against the Luftwaffe than any other American fighter pilot, and by the end of the war was a flying ace credited with 15.5 aerial victories.