1955 in aviation
- February 26 – George F. Smith becomes the first person to survive a supersonic ejection, from a North American F-100 Super Sabre travelling (Mach 1.05).
- June 28 – Jean Moire lands a Bell 47 helicopter on top of Mont Blanc, at an altitude of 4,807 m (15,772 ft)
- July 26 – Capital Airlines adopts the Vickers Viscount, the first US airline to select a British airliner.
- July 27 – an El Al Lockheed Constellation is shot down by Bulgarian Mikoyan-Gurevich MiG-15s. All 58 aboard are killed
- September 3 – J. S. Fairfield makes the first ejection from an aircraft on the ground, escaping from a Gloster Meteor traveling at 120 mph (193 km/h) along a runway
- September 9 – American Airlines, TWA, and United Airlines agree to adopt a domestic "coach class" for transcontinental flights across the United States.
- October 10 – helicopters from USS Saipan play a key role in rescuing people stranded by flooding in Tampico, Mexico
- October 16 – the Boeing 367–80 (707 prototype) crosses the United States in just 3 hours 58 minutes.
- November 1 – a United Airlines Douglas DC-6 is destroyed by a bomb planted by a man attempting to cash in his mother's life insurance policies. 58 people are killed
- December 4 – Glenn A. Martin dies at age 69
- December 15 – the de Havilland Mosquito flies its final operational sortie with the Royal Air Force