Lois Larson
When it comes to the biggest airport in the world, there are a few contenders depending on the metrics used. By area, King Fahd Airport in Saudi Arabia is the largest airport in the world, covering 78,000 hectares or 300 square miles. However, when it comes to passenger traffic and available seats, Hartsfield-Jackson Atlanta International Airport (ATL) in Georgia, USA, is often considered the biggest and busiest airport in the world, handling over 100 million passengers annually. Denver International Airport in the US is also notable for its size, spanning 53 square miles and offering expansive views of the Rocky Mountains and Colorado plains.
| Characteristics | Values |
|---|---|
| Name | King Fahd International Airport |
| Location | Saudi Arabia |
| Size | 78,000 hectares or 300 square miles |
| Comparison | Bigger than Bahrain |
| Second Largest Airport | Denver International Airport, USA |
| Size of Second Largest Airport | 53 square miles |
| Third Largest Airport | Hartsfield-Jackson Atlanta International Airport, USA |
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What You'll Learn
King Fahd airport, Saudi Arabia: biggest by area
King Fahd International Airport in Dammam, Saudi Arabia, is the biggest airport in the world by area. It covers 776 square kilometres (300 square miles), making it larger than the neighbouring country of Bahrain. The airport has two runways, both 4 kilometres (2.5 miles) long, and three terminal buildings. The Passenger Terminal serves mainstream passengers, the Aramco Terminal is used exclusively by Aramco employees, and the Royal Terminal is reserved for the Saudi royal family.
The airport was constructed and inaugurated during the reign of King Fahd (1982–2005) and was opened to commercial traffic in 1999. It has been cited as the largest airport in the world by the Guinness World Records. The basic infrastructure of the airport was completed by the end of 1990, which allowed the U.S.-led coalition forces to use it during the Gulf War in early 1991 for the storage of military aircraft.
The airport's vast size includes a mosque that can accommodate up to 2,000 people, residential housing for up to 3,000 people, and onsite greenhouses. The six-story main terminal building has a total area of 327,000 square metres (3,520,000 square feet). The departure terminal is equipped with several customer counters, including those allocated to airlines and customs and immigration.
King Fahd International Airport is well-connected to destinations across the Middle East and the Indian Subcontinent. It also operates a handful of widebody flights to Europe, with prominent carriers like Lufthansa and KLM connecting passengers to their hubs in Frankfurt and Amsterdam. The airport has been expanding to provide connections to more destinations and targets 185 million passengers as it continues to grow.
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Hartsfield-Jackson Atlanta International: busiest airport
Hartsfield-Jackson Atlanta International Airport (ATL) is the busiest airport in the world. In 2024, it retained its title as the world's busiest airport, with 62.7 million passengers passing through its terminals. This is an increase of 2% from 2023.
The airport's extensive network and smooth operations make it a convenient and reliable starting point for international journeys. It has a network of over 150 domestic and 78 international destinations, connecting Atlanta to the rest of the world. The airport's unmatched capacity, operational efficiency, and ability to manage high traffic volumes while ensuring smooth journeys have made it a favourite among travellers.
The story of Hartsfield-Jackson Atlanta International Airport spans over eight decades, beginning in 1925 when Atlanta's Chamber of Commerce set out to establish a municipal airport. The airport opened in 1926 as Candler Field, with a single dirt runway. The first expansion took place in the 1930s, driven by the growing airmail industry. The airport's rapid expansion continued in the 1970s and 1980s, with new terminals, an expanded runway system, and the introduction of the "people mover" system, the Plane Train. Delta Air Lines established its hub at ATL in the 1970s, further solidifying the airport's dominance.
Today, Hartsfield-Jackson Atlanta International Airport is a global aviation giant, serving over 100 million passengers annually. It is a major economic driver for the city of Atlanta, generating billions of dollars in revenue and supporting tens of thousands of jobs. The airport's capacity continues to increase, with a 2% growth in 2024, solidifying its dominant position in global air travel.
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Denver International Airport: third-largest, with 148 gates
Denver International Airport (DEN) is the third-largest airport in the world by land area, covering 53 square miles (34,000 acres or 137.8 square kilometres). It is the largest airport in the Western Hemisphere by land area and the biggest airport in the United States. DEN is located 25 miles (40 kilometres) northeast of Downtown Denver, in the state of Colorado, and primarily serves metropolitan Denver and the greater Front Range Urban Corridor.
The airport has one terminal, named the Jeppesen Terminal, and three midfield concourses with a total of 148 gates. Concourse A can be accessed directly from the terminal building via a pedestrian bridge, and also via an underground train system that services all three concourses. Passengers must take the train to reach Concourses B and C. All international arrivals without border pre-clearance are processed in Concourse A, which also has four 3-jetway international gates that can support the Airbus A380 and Boeing 747-8, the two largest commercial aircraft in the world.
Denver International Airport is one of the world's busiest airline hubs, serving 69.3 million passengers in 2022 during the global pandemic, making it the third-busiest airport in the world that year. In 2023, it was the sixth busiest airport in the world, serving around 77.8 million passengers, a 12% increase from the previous year. In 2024, DEN welcomed a record-breaking 82.4 million passengers, an increase of 5.8% over the previous year.
The airport is Colorado's primary economic engine, contributing an estimated $47.2 billion annually to the state's economy and employing over 40,000 people, making it the largest employer in the state. The airport has an 82,000-square-foot outdoor plaza that is open to travellers and the general public, and offers views of the Rocky Mountains and Colorado plains in the distance.
While Denver International Airport is the third-largest airport in the world, the largest airport by land area is King Fahd International Airport in Saudi Arabia, which covers 78,000 hectares (300 square miles).
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Dubai International Airport: 57 million available seats
Dubai International Airport (DXB) is one of the world's largest airports. With 57 million available seats, it is the second-largest airport in the world by passenger traffic. It is also the busiest airport for Airbus A380 and Boeing 777 movements, and the airport with the highest average number of passengers per flight. The airport is situated in the Al Garhoud district, 2.54 nautical miles (4.70 km; 2.92 mi) east of Dubai's city centre, and covers 2,900 hectares (7,200 acres) of land.
Dubai International Airport is home to two terminals, seven concourses, and 192 gates. Terminal 3 is the third-largest building in the world by floor space and the largest airport terminal globally. The airport also has a Cargo Mega Terminal capable of handling 3 million tonnes of cargo annually. In addition, the Dubai Flower Centre opened in 2005 to cater to the import and export of flowers, as the facility requires specialist conditions.
Dubai Airport has undergone significant expansion to accommodate larger aircraft, such as the Airbus A380. The Department of Civil Aviation spent $120 million on upgrades, including enlarged gate hold rooms, new finger piers, an enlarged runway, new airbridges, and extended baggage belt carousels. A new Concourse A was built exclusively for Emirates' A380s, costing $3.5 billion.
The airport is a hub for Emirates, which handles 51% of passenger traffic and 42% of aircraft movements. It is also the base for Flydubai, which handles 13% of passenger traffic and 25% of aircraft movements. In 2024, the airport handled over 92 million passengers, 2.2 million tonnes of cargo, and registered over 440,000 aircraft movements. As of January 2025, over 8,500 weekly flights are operated by more than 100 airlines to over 270 destinations worldwide.
Dubai International Airport has also embraced sustainability initiatives. In July 2019, it installed the largest solar energy system in the region's airports, aiming to reduce the city's energy consumption by 30% by 2030. Additionally, Dubai Airports unveiled the world's largest rooftop solar panel installation, meeting 6.5% of the airport's energy needs.
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New Delhi International Airport: thriving due to airline expansion
The world's biggest airport by area is King Fahd Airport in Saudi Arabia, which covers 78,000 hectares. Other notable mentions include Denver International Airport, which is the biggest airport in the US and third-largest in the world, and Atlanta Hartsfield-Jackson International Airport, which is the busiest airport in the world.
New Delhi International Airport, officially known as Indira Gandhi International Airport (DEL), has been undergoing significant expansion in recent years, with ambitious plans to become one of the best airports in the world. The airport aims to handle up to 100 million passengers annually, and its expansion projects reflect this goal.
One of the most notable expansions is the modernisation and enlargement of Terminal 1, which was initially scheduled for completion by the end of 2023 or early 2024. The refurbished terminal will almost triple in size, increasing from 60,000 square meters to 169,000 square meters. This expansion will boost the terminal's capacity from 20 million to 40 million passengers, significantly improving the passenger experience by reducing congestion.
The new Terminal 1 will feature a fully integrated design, with departures and arrivals under the same roof. It will also offer enhanced baggage handling, improved security screening systems, and advanced technologies such as facial recognition and automated tray retrieval. Additionally, the terminal's apron will be expanded to provide a higher-capacity layout, increasing aircraft parking spaces from 55 to 82.
The expansion project also includes the construction of a fourth runway, further supporting the airport's ability to accommodate increased air traffic. The new runway will be approximately 4,400 meters long and 75 meters wide, optimising air traffic flow and enhancing airside safety.
In June 2022, Delhi International Airport became India's first airport to be entirely powered by hydropower and solar energy, showcasing its commitment to sustainability alongside its pursuit of expansion and improved facilities.
The airport's focus on efficient operations and superior customer service is driving its transformation, with the integration of world-class facilities and value-added amenities. As a result, New Delhi International Airport is thriving due to these expansion efforts, solidifying its position as a significant aviation hub in India and beyond.
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Frequently asked questions
King Fahd airport in Saudi Arabia is the largest airport in the world by area, covering 78,000 hectares or 300 square miles.
Denver International Airport is the biggest airport in the US, covering 53 square miles.
Hartsfield-Jackson Atlanta International Airport is the busiest airport in the world. It was the first airport ever to welcome more than 100 million passengers in a year.
Some other large airports include Dubai International Airport, Chicago O'Hare International Airport, and Dallas Fort Worth International Airport.
