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Denver International Airport
Denver International Airport (IATA: DEN, ICAO: KDEN, FAA LID: DEN), often referred to by locals as DIA, is an international airport in the Western United States, primarily serving metropolitan Denver, Colorado, as well as the greater Front Range Urban Corridor.
Runway 16R/34L, with a length of 16,000 feet (3.03 mi; 4.88 km), is the longest public use runway in North America and the seventh longest on Earth. The airport is 25 miles (40 km) driving distance northeast of Downtown Denver, 19 miles (31 km) farther than the former Stapleton International Airport which DEN replaced; the airport is actually closer to the City of Aurora than central Denver, and many airport-related services, such as hotels, are located in Aurora.
Opened in 1995, DEN serves 27 airlines (as of 2025) providing nonstop service to 230 destinations throughout the Americas, Europe, and Asia; it was the fourth airport in the United States to exceed 200 destinations. The airport has been the largest operating hub for Frontier Airlines and Southwest Airlines for several years and, as of 2024, DEN has eclipsed Chicago's O'Hare International Airport as the largest operating hub for United Airlines as well. The Colorado Department of Transportation's 2025 Economic Impact Study estimated that the airport contributes $47.2 billion annually to Colorado's economy and, with over 40,000 employees, the airport is the largest employer in the state of Colorado. The airport is located on the western edge of the Great Plains and within sight of the Front Range of the Rocky Mountains.
In 2021 and 2022, DEN was the third busiest airport in the world as well as the third busiest airport in the United States by passenger traffic. In 2023, it was the sixth busiest airport in the world and remained the third busiest in the United States, having served around 77.8 million passengers, more than a 12% increase from the prior year. DEN has been among the top 20 busiest airports in the world and top 10 busiest airports in the United States every year since 2000.
In 2024, DEN set an all-time passenger record with 82,358,744 passengers served, up 5.8% over the previous record set in 2023.
Denver has traditionally been home to one of the busier airports in the United States because its midcontinent location was ideal for an airline hub. Several airlines, notably United Airlines and Continental Airlines, had hubs at the former Stapleton International Airport, helping make it the sixth-busiest airport in the country by the 1960s. However, Stapleton had little room to add more flights and its runways were too close together, which led to long delays and nationwide travel disruptions in bad weather.
From 1980 to 1983, the Denver Regional Council of Governments investigated areas for a new area airport north and east of Denver. Meanwhile, in 1983, Federico Peña was elected mayor of Denver, campaigning on a plan to expand Stapleton onto Rocky Mountain Arsenal lands. The plan had broad support, but leaders in nearby Adams County threatened to sue over noise concerns.
Eventually Peña struck a deal: Adams County leaders would rally citizens to back a plan for Denver to annex 54 square miles (140 km2) of the county to build an airport away from established neighborhoods. In 1988, Adams County voters approved the annexation. The proposal was met with some skepticism because of its location: 24 miles (39 km) from the heart of the city. But seeing the importance of a Denver air hub to the national transportation system, the federal government put $500 million (equivalent to $1.1 billion as of 2024[update]) toward the new airport. The rest of the cost would be financed by bonds, to be repaid with fees on airlines. Ground was broken in September 1989.
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Denver International Airport
Denver International Airport (IATA: DEN, ICAO: KDEN, FAA LID: DEN), often referred to by locals as DIA, is an international airport in the Western United States, primarily serving metropolitan Denver, Colorado, as well as the greater Front Range Urban Corridor.
Runway 16R/34L, with a length of 16,000 feet (3.03 mi; 4.88 km), is the longest public use runway in North America and the seventh longest on Earth. The airport is 25 miles (40 km) driving distance northeast of Downtown Denver, 19 miles (31 km) farther than the former Stapleton International Airport which DEN replaced; the airport is actually closer to the City of Aurora than central Denver, and many airport-related services, such as hotels, are located in Aurora.
Opened in 1995, DEN serves 27 airlines (as of 2025) providing nonstop service to 230 destinations throughout the Americas, Europe, and Asia; it was the fourth airport in the United States to exceed 200 destinations. The airport has been the largest operating hub for Frontier Airlines and Southwest Airlines for several years and, as of 2024, DEN has eclipsed Chicago's O'Hare International Airport as the largest operating hub for United Airlines as well. The Colorado Department of Transportation's 2025 Economic Impact Study estimated that the airport contributes $47.2 billion annually to Colorado's economy and, with over 40,000 employees, the airport is the largest employer in the state of Colorado. The airport is located on the western edge of the Great Plains and within sight of the Front Range of the Rocky Mountains.
In 2021 and 2022, DEN was the third busiest airport in the world as well as the third busiest airport in the United States by passenger traffic. In 2023, it was the sixth busiest airport in the world and remained the third busiest in the United States, having served around 77.8 million passengers, more than a 12% increase from the prior year. DEN has been among the top 20 busiest airports in the world and top 10 busiest airports in the United States every year since 2000.
In 2024, DEN set an all-time passenger record with 82,358,744 passengers served, up 5.8% over the previous record set in 2023.
Denver has traditionally been home to one of the busier airports in the United States because its midcontinent location was ideal for an airline hub. Several airlines, notably United Airlines and Continental Airlines, had hubs at the former Stapleton International Airport, helping make it the sixth-busiest airport in the country by the 1960s. However, Stapleton had little room to add more flights and its runways were too close together, which led to long delays and nationwide travel disruptions in bad weather.
From 1980 to 1983, the Denver Regional Council of Governments investigated areas for a new area airport north and east of Denver. Meanwhile, in 1983, Federico Peña was elected mayor of Denver, campaigning on a plan to expand Stapleton onto Rocky Mountain Arsenal lands. The plan had broad support, but leaders in nearby Adams County threatened to sue over noise concerns.
Eventually Peña struck a deal: Adams County leaders would rally citizens to back a plan for Denver to annex 54 square miles (140 km2) of the county to build an airport away from established neighborhoods. In 1988, Adams County voters approved the annexation. The proposal was met with some skepticism because of its location: 24 miles (39 km) from the heart of the city. But seeing the importance of a Denver air hub to the national transportation system, the federal government put $500 million (equivalent to $1.1 billion as of 2024[update]) toward the new airport. The rest of the cost would be financed by bonds, to be repaid with fees on airlines. Ground was broken in September 1989.