The Norwegian Army started using Gardermoen as a camp already in 1740, when it was called Fredericksfeldt. The first place flight took place in 1912, and by 1920 there were multiple hangars at the airport.
During the German invasion of Norway during World War II the German bombed the airport, but built it up with two 2000-meter runways during the war.
The military airport was founded on December 1, 1996, with new installations for 1,2 billion NOK. The airfield is built to easily expand cheaply and fast whenever needed. On October 8, 1998 the main airport serving Oslo was moved from Fornebu to Gardermoen. The new airport had among other facilities two runways.