What airport code represents the city of Fort Smith?

The airport code FSM represents the city of Fort Smith, Arkansas. This code follows the International Civil Aviation Organization (ICAO) and International Air Transport Association (IATA) standards for airport codes, where three-letter designations are used to identify airports. FSM is derived from the name of the city, making it intuitive for travelers.

In contrast, the other airport codes presented belong to different cities. FAT is the code for Fresno, California; GRR represents Gerald R. Ford International Airport in Grand Rapids, Michigan; and FRA stands for Frankfurt Airport in Germany. Each of these codes is distinct and corresponds to their respective geographic locations, further confirming that FSM is the correct choice for Fort Smith.