
Denver International Airport (DEN) is one of the busiest airports in the world. In 2021, it was ranked third globally based on total passenger traffic. The airport is huge, covering 33,531 acres (135.7 sq km or 52.4 sq mi), making it the second-largest airport in the world by land area. With six runways and plans to expand to 12, DEN is nearly twice the size of its closest US counterpart, Dallas-Fort Worth International Airport. DEN's large size is mainly due to future-proofing and expansion purposes, as it is challenging to acquire land for airports in expanding cities. The airport is also a major hub for United Airlines and the largest operating base for Frontier Airlines and Southwest Airlines.
| Characteristics | Values |
|---|---|
| Location | Denver, Colorado |
| Land Area | 33,531 acres (135.7 sq km or 52.4 sq mi) |
| Runway Length | 16,000 feet (3.03 mi or 4.88 km) |
| Distance from Downtown Denver | 25 miles (40 km) |
| Number of Airlines | 25 |
| Number of Destinations | Over 215 |
| Major Airlines | United, Frontier, Southwest |
| Security Checkpoints | South, West |
| Public Art | Sculptures, murals, photos, sound art, paintings |
| Passenger Traffic Ranking | Third busiest airport in the world in 2021 |
| Peak Hours | Mornings and holidays |
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What You'll Learn
- Denver International Airport is the third busiest airport in the world
- It is a major hub for United Airlines and Frontier Airlines
- The airport is large due to future-proofing and expansion
- It is well-connected given its geographic location
- Denver Airport is nearly twice the size of its closest US counterpart

Denver International Airport is the third busiest airport in the world
Denver International Airport (DEN) is a major hub for air travel, ranking as the third busiest airport in the world in 2021 and 2022. With its vast expanse of 33,531 acres, it is the largest airport in the Western Hemisphere and the second largest globally. DEN's convenient location in the geographic middle of North America, coupled with its efficient operations, has made it a preferred choice for travellers.
The airport serves as a crucial gateway, offering non-stop services to over 215 destinations across the Americas, Europe, and Asia. Its proximity to the Rocky Mountains and its role as a primary economic engine for Colorado further enhance its appeal. DEN's carriers served approximately 78 million passengers in 2023, a remarkable 12-13% increase from the previous year, showcasing its popularity and accessibility.
Several factors contribute to DEN's high passenger traffic. Firstly, its location serves as a strategic advantage, attracting travellers from across the globe. Secondly, the airport has a large number of employees, over 40,000, ensuring smooth operations and efficient customer service. Additionally, the airport has a comprehensive public art program, featuring sculptures, murals, and paintings, enhancing the overall experience for travellers.
The airport has also undergone significant developments, including the addition of new gates, security checkpoints, and airlines. The introduction of CLEAR+ lanes at the South and West Security Checkpoints has expedited security clearance, reducing wait times for travellers. Furthermore, DEN has established itself as a prominent hub for major airlines, serving as the largest operating base for Frontier Airlines and Southwest Airlines, while also being a significant hub for United Airlines.
Denver International Airport's ranking as the third busiest airport in the world underscores its pivotal role in global aviation. With its extensive connections, efficient operations, and continuous development, DEN remains a bustling hub for travellers from all corners of the earth.
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It is a major hub for United Airlines and Frontier Airlines
Denver International Airport (DEN) is a major hub for United Airlines and the largest operating base for Frontier Airlines. In 2021, United Airlines, Frontier Airlines, and Southwest Airlines all had more arrivals and departures at DEN than at any other travel hub. This was the first time an airport ranked first for total flights for three different carriers.
United Airlines is the second-largest carrier at DEN after Southwest Airlines. The airport is so crowded in part because it is a major hub for United Airlines, which is one of the three carriers that ranked DEN as their top airport for flights in 2021. United Airlines also influenced the construction of DEN, as it requested the installation of a large-scale automated baggage system. However, this project was a massive failure and was terminated after a decade due to maintenance issues.
DEN is a critical hub for Frontier Airlines, as it is the largest operating base for the airline. In August 2022, DEN began an additional gate expansion project that would bring a total of 14 ground-loaded/tarmac gates to the east end of Concourse A to be used solely for Frontier Airlines operations. This expansion project demonstrates the airport's commitment to accommodating Frontier Airlines and ensuring its efficient operation at DEN.
The large size of DEN, spanning 33,531 acres, also contributes to its capacity to handle a high volume of passengers and flights for major airlines such as United and Frontier. The airport has six runways and plans to expand to 12, ensuring efficient air traffic management and contributing to its attractiveness as a hub for these airlines. Additionally, DEN's location in the middle of the country makes it an ideal hub for air traffic, further enhancing its appeal to major airlines.
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The airport is large due to future-proofing and expansion
Denver International Airport (DEN) is the largest airport in the Western Hemisphere by land area, spanning 33,531 acres (52.4 sq mi; 135.7 km2). It is the second-largest airport in the world, behind King Fahd International Airport. DEN has the longest public-use runway in North America, which is 16,000 feet (3.03 mi; 4.88 km) long.
The airport's large size is mainly due to future-proofing and expansion. DEN currently has six runways but plans to expand to 12. As a city expands, it becomes less likely to give up commercial real estate for an airport, making it challenging for older airports to expand. DEN was built with expansion in mind, and the federal government saw its potential as an ideal hub for air traffic due to its central location.
The airport has continued to expand since its opening in 1995, with the addition of new gates, security checkpoints, and renovations. In 2018, DEN served 25 different airlines, offering non-stop service to over 215 destinations, and it is expected that annual passenger traffic will reach 100 million in 2027.
The large size of the airport also allows for the construction of terminals, parking lots, airport hotels, and other amenities that attract the public. DEN has the Jeppesen Terminal with three concourses and 179 gates, with more being built. The terminal features artwork, including sculptures, murals, and paintings, financed by a mandatory 1% capital improvement budget.
The expansion of DEN has faced some challenges, such as the failure of the automated baggage system installed at the request of United Airlines, which had initially refused to fly to the airport due to high fees. However, despite these setbacks, DEN continues to grow and is a major hub for airlines such as United, Frontier, and Southwest.
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It is well-connected given its geographic location
Denver International Airport (DEN) is the third busiest airport in the world by total passenger traffic. It is also the largest airport in the Western Hemisphere by land area, covering 33,531 acres (52.4 sq mi; 135.7 km2). DEN is nearly twice the size of its closest US counterpart, Dallas-Fort Worth International Airport, which is 26,89 square miles. DEN is well-connected given its geographic location as a star hub in the middle of the country. It is the largest operating base for Frontier Airlines and Southwest Airlines, and a major hub for United Airlines.
The airport is located 25 miles (40 km) driving distance northeast of Downtown Denver. It is actually closer to the City of Aurora than central Denver, and many airport-related services, such as hotels, are located in Aurora. DEN is also home to the longest runway in North America, with 16R/34L being 16,000 feet (4,877 m or 3.03 miles) long. The runway is necessary for aircraft to get up to speed and take off safely, even in challenging weather conditions.
The airport has six runways and plans to expand to 12. It has one terminal, the Jeppesen Terminal, with three concourses and 179 gates, with more being built. The terminal features a significant number of artworks, including sculptures, murals, photos, sound art, and paintings.
DEN offers non-stop service to over 215 destinations throughout the Americas, Europe, and Asia. It is well-connected and easily accessible, with commuter rail service to Denver Union Station. The airport has also seen the addition of a Westin hotel and ongoing construction, with the recent opening of the West Security Checkpoint.
Denver International Airport's location in the middle of the country and its extensive infrastructure, including the longest runway in North America, contribute to its status as a well-connected and busy aviation hub.
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Denver Airport is nearly twice the size of its closest US counterpart
Denver International Airport (DEN) is the largest airport in North America by surface area, spanning 33,531 acres (135.7 square km or 52.4 square miles) of land. This makes it nearly twice the size of its closest US counterpart, Dallas-Fort Worth International Airport (DFW), which covers 17,207 acres (69.63 square km or 26.89 square miles). DEN is also home to the longest runway in North America, with Runway 16R/34L stretching 16,000 feet (4,877 meters or 3.03 miles) in length, making it the seventh-longest runway in the world.
The airport's massive size is a result of several factors, including future expansion plans, safety considerations, and its location. Firstly, DEN was designed with future expansion in mind. It currently has six runways and intends to double that number to 12 in the future. Additionally, the airport needed to accommodate various facilities and amenities, such as terminals, parking lots, and airport hotels, to attract travellers.
Secondly, safety played a crucial role in determining the airport's size. DEN is located 5,430 feet above mean sea level, where high temperatures and elevation reduce air density, impacting aircraft lift and thrust. As a result, a longer runway is necessary to ensure safe takeoffs and landings, especially in challenging weather conditions.
Furthermore, the airport's location, 24 to 25 miles (36 to 40 km) from central Denver, was chosen to address noise concerns and avoid limitations on future expansion. The federal government recognized the site's potential as a central hub for air traffic and contributed $500 million to the project. The construction of DEN, which began in 1989, was a massive undertaking, employing 11,000 workers and costing $4.8 billion, nearly $2 billion over budget.
Denver International Airport's size is not just a matter of scale but also a strategic decision to accommodate future growth, prioritize safety, and establish a central air traffic hub. Its large expanse has made it a significant aviation hub, serving 25 airlines and offering non-stop service to over 215 destinations worldwide as of 2018.
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Frequently asked questions
Denver Airport is a major hub for United Airlines and the largest operating base for both Frontier Airlines and Southwest Airlines. In 2021, each of these carriers arrived and departed at Denver Airport more than any other travel hub. The airport is also conveniently located in the geographic middle of the United States, making it an ideal hub for air traffic.
Denver Airport is the third busiest airport in the world, trailing Hartsfield-Jackson Atlanta International Airport and Dallas/Fort Worth International Airport. In 2021, it ranked higher than Chicago-O'Hare, Los Angeles International Airport, and Orlando International Airport.
Denver Airport is the second-largest airport in the world by land area. Its large size is mainly due to future-proofing and expansion purposes. The airport currently has six runways but plans to expand to 12.
It is recommended to arrive early during peak hours as security lines are often longer in the mornings and around holidays. It is also advisable to check for departure delays and monitor the status of a particular flight using a flight tracker.











































