Scenery Review : KDEN - Denver International Airport by Tom Curtis   Route : KSEA (Seattle) to KDEN (Denver)   Denver International Airport (IATA: DEN, ICAO: KDEN), often referred to as DIA, is an airport situated in Denver, Colorado in the United States. Denver is known as the "Mile-high City" It is also known as" Wall Street of the West" (Queen of the West as well). Denver International Airport (DIA) is situated 25 miles (40 km) driving distance North West from downtown Denver, and at 140