Denver International Airport (IATA: DEN, ICAO: KDEN, FAA LID: DEN), often called DIA, is, by land size at 53 square miles (140 km2), the largest international airport in the United States, and the second largest international airport in the world after only King Fahd International Airport. Runway 16R/34L is the longest public use runway in the United States.

In 2008, Denver International Airport was the tenth busiest airport in the world by passenger traffic with 51,245,334 passengers. It was also the fifth busiest airport in the world by aircraft movements with 625,884 movements.

The airport is located in extreme northeastern Denver, Colorado, and is operated by the City and County of Denver. Denver International Airport is the busiest and largest airport in the United States without non-stop service to and from Asia, although the airport is actively seeking such flights. DIA was voted the 2005 Best Airport in North America by readers of Business Traveler Magazine and was named "America's Best Run Airport" by Time Magazine in 2002.

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