Roberta Aguirre
Hartsfield–Jackson Atlanta International Airport is the world's busiest airport by passenger traffic. It has held this title every year since 1998, except in 2020 when travel restrictions due to the COVID-19 pandemic caused a dip in passenger traffic. Dubai International Airport is another airport that has consistently ranked among the busiest in the world, especially in 2023, 2024 and 2025. Other airports that have been ranked among the busiest include London Heathrow Airport, Chicago O'Hare International Airport, and Dallas Fort Worth International Airport.
| Characteristics | Values |
|---|---|
| Name | Hartsfield-Jackson Atlanta International Airport (ATL) |
| Location | Atlanta, Georgia, United States |
| Number of Passengers in 2024 | More than 108 million |
| Ranking History | Ranked as the busiest airport for 26 out of the last 27 years |
| Airline Hub | Delta Air Lines |
| Cargo Traffic | Top 20 global airport for cargo tonnage |
| Passenger Traffic in 2023 | 108 million (a 3% jump from 2023) |
| Passenger Traffic in 2029 (predicted) | 125 million |
| International Traffic Growth | 14% |
| Second Busiest Airport | Dubai International Airport (DXB) |
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What You'll Learn
Hartsfield–Jackson Atlanta International Airport
The airport is a megahub for Delta Air Lines and has seen over 108 million passengers in 2024, a more than 3% jump from 2023. It is expected to reach 110 million passengers in 2025 and surpass 125 million by 2029. Hartsfield–Jackson Atlanta International Airport is also a top global airport for cargo tonnage.
The airport contributes significantly to the economy of the Atlanta metropolitan area, generating an estimated $35 billion annually and supporting over 63,000 on-site jobs. The City of Atlanta has invested heavily in the airport's expansion, with the $11.6 billion ATLNext programme designed to increase service capacity, optimise operations, and enhance the passenger experience.
Improvements under the ATLNext programme include the widening and extension of Concourse D, the addition of new gates, improved hold rooms, and the construction of new parking decks and lots. The programme also includes runway extensions, new taxiways, and the addition of a sixth runway. The airport is also undergoing extensive upgrades to its support facilities, such as the replacement of Fire Station 40 and the upgrading of the maintenance complex that houses Delta TechOps.
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Dubai International Airport
The history of civil aviation in Dubai dates back to 1937, when an air agreement was signed for a flying boat base for Imperial Airways aircraft. The airport began to develop in the 1970s with the advent of wide-body aircraft, and several extensions and upgrades have been made since. Terminal 2 opened in 1998, and the Sheikh Rashid Terminal, or Concourse 1, opened in 2000. The Dubai Flower Centre opened in 2005, as the city is a hub for the import and export of flowers.
The airport offers VIP services, sleep pods, and spa treatments. It also provides easy transport links, including hotel shuttles, taxis, and the Dubai Metro.
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London Heathrow Airport
Heathrow Airport has seen substantial expansion over the years and now has two parallel east-west runways, four passenger terminals, and one cargo terminal. The runways are oriented east-west, so aircraft usually approach over the Greater London Urban Area when the wind blows from the west. Heathrow is surrounded by several villages and neighbourhoods, including Sipson, Harlington, Harmondsworth, Longford, Cranford, Hatton, Feltham, Bedfont, and Stanwell.
In terms of passenger traffic, Heathrow Airport is one of the busiest airports in the world, specifically for international passengers. While Hartsfield-Jackson Atlanta International Airport in Georgia, US, has consistently been ranked as the world's busiest airport, Heathrow follows closely behind. In 2024, Atlanta saw over 108 million passengers, while Heathrow ranked second for international passengers. Heathrow has also experienced an increase in cargo-only flights due to the COVID-19 pandemic, with established carriers and dedicated cargo airlines operating these flights.
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Chicago O'Hare International Airport
O'Hare International Airport is located on Chicago's Northwest Side, approximately 17 miles (27 km) northwest of the Loop business district. The airport covers 7,627 acres (11.92 sq mi; 30.87 km2) and is operated by the Chicago Department of Aviation. O'Hare first began as an airfield and manufacturing plant for Douglas C-54 Skymasters during World War II. After the war, Chicago invested in expanding the airport, and it officially became O'Hare International Airport in 1955. However, growth was initially slow, as airlines were reluctant to move from Midway International Airport, Chicago's original ""busiest square mile." It wasn't until the jet age and the opening of new terminals in 1962 that airlines began to relocate to O'Hare.
O'Hare's transition to the jet age and its capacity for longer runways allowing non-stop flights to Europe contributed to its rapid growth in passenger traffic. By 1963, O'Hare had become the world's busiest airport, serving 10 million passengers annually. This number doubled within just two years. O'Hare maintained its position as the world's busiest airport until 1998 when it was surpassed by Hartsfield-Jackson Atlanta International Airport.
Despite no longer holding the top spot, O'Hare remains a significant aviation hub. In 2019, it recorded 919,704 aircraft movements, averaging 2,520 per day, the most of any airport worldwide. This high number of aircraft movements is partly due to a large number of regional flights. O'Hare serves as a hub for major airlines such as American Airlines, United Airlines, Frontier Airlines, and Spirit Airlines. The airport is easily accessible by road, with Interstate 190 (Kennedy Expressway) connecting directly to the airport.
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Shanghai Pudong International Airport
Pudong Airport is a fast-growing hub for both passenger and cargo traffic. In 2024, the airport handled 3,440,084 metric tons of cargo, making it the world's third-busiest airport by cargo traffic. In 2023, it served a total of 54,476,397 passengers, ranking as the second busiest airport in China, the sixth busiest in Asia, and the twenty-first busiest worldwide. Pudong Airport is also the busiest international gateway in mainland China, with approximately 35.25 million international passengers.
The airport has four runways, with two primarily used for landing and the other two for takeoff. Terminal 1, which opened in 1999, has a capacity of 20 million passengers and features 204 check-in counters, thirteen luggage conveying belts, and an area of 280,000 square metres (3,000,000 square feet). The exterior of Terminal 1 is uniquely shaped like a seagull, and it has 28 gates, including 13 double-decker gates.
To accommodate the growing demand for air travel, construction on an additional satellite concourse facility began in 2015 and was completed in September 2019. This new facility, the largest stand-alone satellite airport terminal building in the world, can support 38 million passengers annually through 90 departure gates across two concourses (S1 and S2). The S1 and S2 concourses are connected to the existing T1 and T2 terminals by an underground Shanghai Pudong Airport APM.
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Frequently asked questions
Chicago O'Hare International Airport (ORD) is the world's eighth busiest airport in terms of passenger traffic.
O'Hare International Airport served 46,992,360 passengers in 2024, according to OAG data.
O'Hare International Airport has experienced issues with flight disruptions and delays. According to AirHelp, 25% of commercial flights at the airport were disrupted in March, ranking it as the airport with the fourth most flight disruptions in the US.
Chicago O'Hare International Airport was the world's tenth busiest airport in 2024 in terms of total domestic and international seats.
