1939
- January 13 – Northwest Airlines Flight 1, a Lockheed L14H Super Electra, crashes on descent to Miles City, Montana, killing all four on board; the aircraft's cross-feed fuel valve leaked fuel into the cockpit and an intense fire broke out.
- January 21 – Imperial Airways Short Empire flying boat Cavalier makes an emergency landing 285 mi southeast of New York due to loss of power and later sinks; 3 of 12 on board die.
Read more about this topic: List Of Accidents And Incidents Involving Commercial Aircraft