Which airport has IATA DEN and ICAO KDEN?

Which airport has IATA DEN and ICAO KDEN?

• A. IATA DFW; ICAO KDFW
• B. IATA LAX; ICAO KLAX
• C. IATA DEN; ICAO KDEN
• D. IATA JFK; ICAO KJFK

Answer: (C)

DEN is the IATA code for Denver, and KDEN is its ICAO code. IATA codes are the three-letter codes you see on tickets and baggage tags, while ICAO codes are four-letter identifiers used in flight planning and air traffic control. In the United States, many ICAO codes begin with K followed by the airport’s three-letter IATA code, so DEN and KDEN point to the same airport: Denver International Airport in Colorado. The other options pair IATA and ICAO codes that belong to different airports (for example, Dallas/Fort Worth uses DFW and KDFW, Los Angeles uses LAX and KLAX, New York’s JFK uses JFK and KJFK), so they don’t match DEN with KDEN.