What is the airport code for Columbus, Ohio?

The airport code for Columbus, Ohio, is CMH, which stands for John Glenn Columbus International Airport. Airport codes are typically three-letter designations assigned by the International Civil Aviation Organization (ICAO) or the International Air Transport Association (IATA) to identify airports globally. In this case, CMH specifically identifies the main airport serving Columbus, differentiating it from other airports in the region.

The other options provided represent codes for different airports: CID is the code for The Eastern Iowa Airport in Cedar Rapids, Iowa; CLT is the code for Charlotte Douglas International Airport in North Carolina; and DSM is the code for Des Moines International Airport in Iowa. Each code uniquely represents a different location, confirming that CMH is the correct answer for Columbus, Ohio.