What airport code corresponds to Kodiak, Alaska?

Kodiak, Alaska, is represented by the airport code KOD. This code is specified in the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA) standards for identifying airports. KOD is derived from the name of the city, Kodiak, which is on Kodiak Island.

The other codes, while they may appear plausible, do not correspond to Kodiak. KIK and KDX do not reflect the official designation for Kodiak's airport, and KDT also does not align with the city's recognized airport code. Therefore, KOD is the only correct choice that represents Kodiak's airport.