Mexico City Benito Juárez International Airport

Mexico City Benito Juárez International Airport carries the IATA code MEX — the three letters printed on boarding passes and baggage tags — and the ICAO code MMMX, used in flight plans and by air traffic control. It serves Mexico City, Mexico.

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.