Ulaanbaatar is served by the Buyant-Ukhaa International Airport (formerly Buyant Ukhaa Airport). It is  southwest of the city. The Chinggis Khaan airport is the only airport in Mongolia that offers international flights. In order to serve increased projected passenger numbers, the New Ulaanbaatar International Airport (NUBIA) further south of the city opened in 2021 to replace the Chinggis Khaan airport.