Kjeller Airport (Norwegian: Kjeller flyplass; ICAO: ENKJ) is a military and general aviation airport located in Kjeller in Skedsmo, Norway. Situated in the outskirts of Lillestrøm, it is 9 nautical miles (17 km; 10 mi) east northeast of Oslo, making it the airport located the closest to the capital. The airport has a single 1,735-meter (5,692 ft) asphalt runway numbered 12–30, with a declared distance of 1,357-meter (4,452 ft). The airport is owned by the Norwegian Defence Logistics Organization, while the civilian operations is carried out by Kjeller Aero Senter. The main military activity is the Aerospace Industrial Maintenance Norway, the main maintenance facility for the Royal Norwegian Air Force (RNoAF).

The airport became the first in Norway when it was established in September 1912 to serve the Norwegian Army Air Service. The break-out of World War I resulted in a major expansion of the air field, followed by military aircraft factory Kjeller Flyfabrikk moving to Kjeller in 1916. Gradual expansions took place in the following decades. The airport was occupied by the Luftwaffe on 10 April 1940, resulting in Junkers, Daimler-Benz, BMW and Brinker Eisenwerk establishing various maintenance facilities at the airport. After liberation in 1945, the RNoAF converted Kjeller to a maintenance base and placed the Air Force Logistics Command there from 1952. Runway expansions took place in 1951, 1959 and 1975.

Kjeller Airport was the first airport established in Norway. The need for an airport for the Norwegian Army Air Service arose in September 1912, after the first four pilots had been trained and the two first aircraft, Maurice Farman Longhorns, were obtained. Two of the pilots went scouting around Lillestrøm on 8 September to find a suitable location for an air field, and settled on Kjeller after two days of reconnaissance. The area was selected because of its vicinity to the capital and its flat geography. The first aircraft, Ganger Rolf, was hauled by Kjeller by horse on 14 September, where it was assembled and flew for the first time on 21 September. Construction of a hangar was subcontracted to Strømmens Trævarefabrik on 13 September, and the structure was completed on 27 September. The first flight to another airport took place on 3 October, when a plan flew to Trondheim, piloted by Einar Sem-Jacobsen, the commander at Kjeller.

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