What is the ICAO code for Denver?

The ICAO code for Denver is KDEN. This code follows the International Civil Aviation Organization's coding system, which assigns unique four-letter alphanumeric designators to each airport. In the case of KDEN, the letter "K" indicates that the airport is located in the United States, and the "DEN" signifies Denver specifically.

The additional choices deviate from the official ICAO format: "KDOVE" and "KDENR" do not correspond to any recognized airport codes, and "KDN" lacks the necessary fourth letter that is essential for ICAO codes. Thus, KDEN stands out as the only valid and officially recognized ICAO code for Denver.