Which city is represented by the airport code CMH?

The airport code CMH stands for Columbus, Ohio. Airport codes are typically derived from the city name or the airport itself, often using the first letters of the city or a combination of letters that represent it. In this case, "CMH" comes from "Columbus", capturing the distinctive identity of the city it serves.

Columbus is the capital of Ohio and has an important transportation hub, making it logical for it to have a specific three-letter code to facilitate air travel operations. The other options represent different cities and have their own unique airport codes, which do not correspond to "CMH". For instance, Des Moines has the code DSM, Dallas-Fort Worth uses DFW, and Greenville/Spartanburg is represented by GSP. These airport codes are standardized and widely recognized in the aviation industry, ensuring clarity in flight bookings, itineraries, and air traffic navigation.