John Glenn Columbus International Airport

John Glenn Columbus International Airport is an airport located in Columbus Ohio, US. The airport's IATA code is CMH, which is the three-letter code used on boarding passes and flight bookings. The ICAO code is KCMH, used by air traffic control and pilots for flight planning.

The airport operates in the America/New_York timezone. When planning flights to or from CMH, use our flight duration calculator to account for timezone differences, especially for international travel.

John Glenn Columbus International Airport sits at an elevation of 815 feet (248 meters) above sea level.

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