Notodden Airport, Tuven (Norwegian: Notodden flyplass, Tuven; IATA: NTB, ICAO: ENNO) is a municipal regional airport at Heddal in Notodden, a municipality in Telemark county, Norway. The airport is mostly used for general aviation, and has extensive sailplane activity. Bergen Air Transport operates the airport's only scheduled route, six times per week to Bergen Airport, Flesland. In 2011, the airport had 5,078 aircraft movements and 3,423 passengers. The airport has a single 1,393-by-40-meter (4,570 by 131 ft) runway with flight information service and instrument landing system.