Kjeller Airport (ICAO: ENKJ) is a military and general aviation airport located in Kjeller, Norway, near Lillestrøm and 9 NM (17 km; 10 mi) east northeast of Oslo. It has facilities for carrying out maintenance for aircraft belonging to the Royal Norwegian Air Force. Aviation has a long history at Kjeller. Kjeller is Norway's first airport, built in 1912. In the first part of the 20th century there was a small aircraft factory building military planes. There is now a small aircraft museum.