Ulaanbaatar Chinggis Khaan International Airport

Ulaanbaatar Chinggis Khaan International Airport carries the IATA code UBN — the three letters printed on boarding passes and baggage tags — and the ICAO code ZMCK, used in flight plans and by air traffic control. It serves Ulaanbaatar (Sergelen), Mongolia.

IATA codes are assigned by the International Air Transport Association for passenger-facing use; the four-letter ICAO code encodes region and country and belongs to the operational side of aviation.