John Glenn Columbus International Airport

John Glenn Columbus International Airport carries the IATA code CMH — the three letters printed on boarding passes and baggage tags — and the ICAO code KCMH, used in flight plans and by air traffic control. It serves Columbus, United States.

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.