Kjeller Airfield (Norwegian: Kjeller flyplass; ICAO: ENKJ) is a military and general aviation aerodrome located in Kjeller in Lillestrøm in Akershus county, Norway. Situated on the outskirts of Lillestrøm, it is 9 nautical miles (17 km; 10 mi) east northeast of Oslo, making it the aerodrome closest to the capital. The field 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 civilian operations are 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 aerodrome 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 airfield, followed by military aircraft factory Kjeller Flyfabrikk moving to Kjeller in 1916. Gradual expansions took place in the following decades. The airfield was occupied by the Luftwaffe on 10 April 1940, resulting in Junkers, Daimler-Benz, BMW and Brinker Eisenwerk establishing various maintenance facilities. After liberation in 1945, the RNoAF converted Kjeller to a maintenance base and placed the Air Force Logistics Command there from 1952.