Chinggis Khaan International Airport, also referred to as New Ulaanbaatar International Airport (IATA: UBN, ICAO: ZMCK), is an international airport located in the Khöshig Valley of Sergelen, Töv, Mongolia, 52 km south of the capital Ulaanbaatar and 20 km southwest of Zuunmod. It started its operations on 4 July 2021 and serves as the primary airport for Ulaanbaatar and its metropolitan area, functioning as a replacement for Buyant-Ukhaa International Airport.