September 1 / Saab 29 Tunnan first flight
September 2 / Grumman F4F Wildcat first flight
September 3 / Pilatus P-3 first flight
September 7 / Lockheed Martin F-22 Raptor first flight
September 7 / Bell AH-1 Cobra first flight
September 10 / Nord Noratlas first flight
September 11 / Agusta A129 Mangusta first flight
September 12 / Gloster Gladiator first flight
September 13 / Eurocopter AS332 Super Puma first flight
September 14 / Patrouille de France formally commissioned
September 15 / Boeing C-17 Globemaster III first flight
September 18 / Avro 504 first flight
September 19 / Mil Mi-24 first flight
September 21 / Boeing CH-47 Chinook first flight
September 21 / Boeing B-29 Superfortress first flight
September 24 / North American T-28 Trojan first flight
September 26 / de Havilland Sea Vixen first flight
