OMA is the airport code for which city?

The airport code OMA specifically stands for Omaha, Nebraska. Each airport in the United States is assigned a three-letter code by the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA) for ease of identification. In this case, OMA is derived from the name of the city, making it a straightforward representation of Omaha. Other cities listed have their unique codes; for example, Orlando is represented by MCO, Ontario by ONT, and Oklahoma City by OKC. Thus, the distinctiveness of OMA correlates directly to its association with Omaha, Nebraska, confirming it as the correct answer.