Ulaanbaatar Airport also Known as Chinggis Khaan International Airport (IATA: ULN, ICAO: ZMUB) is the international airport serving Ulaanbaatar, Mongolia, situated 18 km (11 mi) southwest of the capital.

Ulaanbaatar Airport is the largest international air facility in the country. The airport was first established as Buyant-Ukhaa airport on February 19, 1957. In 1958, international flights began with flights to Irkutsk and Beijing using Ilyushin Il-14 aircraft. Regular flights from the airport started in 1961, The terminal was upgraded to make it suitable for international traffic in 1986. Between 1994 and 1997 a further major upgrade of construction and air navigation was achieved with the assistance of the Asian Development Bank,[3] making the airport compliant with ICAO standards. The US$50million Construction project was carried out by the successful bidder: a German / British joint venture of Philipp Holzmann and Wimpey Asphalt.

The Ulaanbaatar Airport was named after Chinggis Khaan (Genghis Khan) to celebrate the 800th anniversary of the establishment of a Mongolian State on December 21, 2005.