
Airports are bustling hubs of activity, with thousands of passengers passing through their gates daily. But which airport carries the most passengers? In the US, Hartsfield-Jackson Airport in Atlanta, Georgia, has been the busiest airport for 26 out of the past 27 years and was the only airport to surpass a 100 million passenger count. Globally, Shanghai's Pudong Airport saw a 41% increase in traffic in 2024, while Chicago's O'Hare Airport handles 80 million passengers annually. Heathrow Airport in London, Europe's busiest airline hub, operates at almost full capacity with only two runways.
| Characteristics | Values |
|---|---|
| Busiest Airport in the World | Hartsfield-Jackson Airport, Atlanta |
| Passenger Count | 100 million+ |
| Hometown Carrier | Delta |
| Number of Daily Flights | 1,000+ |
| Destinations | 200+ |
| Busiest Airport in China | Shanghai's Pudong Airport |
| Busiest Airport in India | Indira Gandhi Airport |
| Busiest Airport in Chicago | O'Hare |
| Busiest Hub for American and United Airlines | O'Hare |
| Busiest Hub for Southwest Airlines | Midway Airport |
| Busiest Airline Hub in Europe | Heathrow Airport, London |
| Busiest Airport in Japan | Haneda |
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What You'll Learn
- Hartsfield-Jackson Airport, Atlanta, is the world's busiest airport
- Shanghai's Pudong Airport saw a 41% increase in traffic in 2023
- Chicago's O'Hare Airport handles 80 million passengers annually
- Heathrow Airport is Europe's busiest airline hub
- Denver International Airport is one of America's fastest-growing airports

Hartsfield-Jackson Airport, Atlanta, is the world's busiest airport
Hartsfield-Jackson Atlanta International Airport is the world's busiest airport. On one Sunday, the airport experienced over 640 flight delays due to technicians resolving a runway equipment issue. The Federal Aviation Administration (FAA) issued a ground stop at 10:40 am ET to manage the traffic flow and congestion at the airport. This was lifted at 12:30 pm, but departures continued to be delayed.
Hartsfield-Jackson Airport has faced significant disruptions, with all flights grounded due to equipment failure. This caused chaos, as one of the world's busiest airports experienced massive delays. The Federal Aviation Administration played a crucial role in managing the situation, implementing a Traffic Management Program to control arriving traffic at the airport.
The airport has also faced challenges with air traffic controller staffing issues, similar to those faced by Newark Airport. These issues can lead to unsafe situations for travellers, as reported by an anonymous air traffic controller at Newark.
Despite these challenges, Hartsfield-Jackson Atlanta International Airport remains a critical hub for air travel, with a high volume of flights and passenger traffic. Its status as the world's busiest airport underscores the importance of efficient management and quick resolutions to any issues that arise.
Hartsfield-Jackson Atlanta International Airport's continued efforts to address delays, ground stops, and equipment issues are essential to maintaining its position as the world's busiest and most efficient airport.
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Shanghai's Pudong Airport saw a 41% increase in traffic in 2023
Shanghai's Pudong Airport witnessed a remarkable 41% increase in air traffic in 2023, propelling it from the 21st spot to the 10th spot in global airport rankings. This significant surge in passenger numbers contributed to China's post-pandemic recovery in air travel. Pudong Airport is one of the two international airports serving Shanghai, China, and it is located about 30 kilometres from the city centre. Covering an area of 40 square kilometres, the airport is a bustling hub for both passenger and cargo traffic.
The airport's rapid ascent in the rankings can be attributed to several factors. Firstly, the expansion of visa policies and the resumption and growth of international flights played a pivotal role in attracting more travellers. Operational improvements also contributed to the airport's enhanced performance. Additionally, the rebound of the Asia-Pacific region, particularly China, was a significant factor in Pudong Airport's traffic increase.
Pudong Airport is the main hub for China Eastern Airlines and Shanghai Airlines and serves as a prominent international hub for Air China and a secondary hub for China Southern Airlines. The airport is strategically connected to Shanghai Hongqiao Airport, the city's other major airport, through the Shanghai Metro Line 2 and the Shanghai Maglev Train. Pudong Airport also boasts an extensive public transportation network, with several public transport lines serving the airport and providing easy access to the city.
The airport has undergone multiple expansion projects to accommodate growing demand. In 2011, the Chinese government approved a new round of expansion, which included the construction of two new runways, significantly increasing the airport's capacity. Pudong Airport's continuous expansion and improvement efforts have solidified its position as a key player in global aviation and contributed to its impressive growth in passenger traffic.
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Chicago's O'Hare Airport handles 80 million passengers annually
Chicago's O'Hare International Airport is one of the world's busiest airports in terms of passenger numbers, handling around 80 million passengers each year. In fact, it is so busy that a potential measles exposure at the airport in 2025 affected hundreds of people, as an infected adult spent time in Terminal 1, the area of the airport that sees the most traffic.
O'Hare is one of three major airports in the New York region, which is home to some of the busiest airports in the country. The airport is so large that it has its own TSA federal security director for Illinois, and it is used by travellers from across the world.
The high passenger numbers at O'Hare are due in part to its location in Chicago, a major transport hub and popular tourist destination. The airport is also a focus for many major airlines, which offer a wide range of domestic and international flights to and from the airport.
O'Hare is known for its efficient operations, with TSA employees often reporting lower-than-usual wait times at the airport. Despite the high volume of passengers, the airport runs smoothly, with security and customs processes that are generally quick and well-managed.
The airport's efficient operations and high passenger volume contribute to its reputation as one of the world's leading aviation hubs, solidifying its place as one of the busiest airports globally.
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Heathrow Airport is Europe's busiest airline hub
Heathrow Airport is located 14 miles (23 kilometres) west of Central London. It is owned and operated by Heathrow Airport Holdings, whose owners include Ardian, Qatar Investment Fund, and Saudi Arabia's Public Investment Fund. The airport is the primary hub for British Airways and Virgin Atlantic. More than 89 airlines fly to 214 destinations in 84 countries. The busiest single destination in passenger numbers is New York, with over three million passengers flying between Heathrow and JFK Airport in 2021.
Heathrow has four passenger terminals (numbered 2 to 5) and a cargo terminal. The airport introduced a cap on the number of daily departing passengers in July 2022 to improve the passenger experience. By August 2022, LHR had added 1,300 security staff, enabling 88% of passengers to navigate through security in less than 20 minutes. Heathrow is testing the usage of artificial intelligence to assist air traffic controllers in managing its busy airspace.
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Denver International Airport is one of America's fastest-growing airports
Denver International Airport (DEN) is one of America's fastest-growing airports. In 2023, the airport announced plans to significantly increase its passenger capacity by expanding the Jeppesen Terminal by 2045, adding new concourses with 100 more gates. DEN is the largest airport in the Western Hemisphere by land area, covering 33,531 acres (52.4 sq mi; 135.7 km2). It is located 23-25 miles from Downtown Denver and primarily serves metropolitan Denver, Colorado, and the greater Front Range Urban Corridor.
DEN's growth can be attributed to several factors. Firstly, its central location in the US makes it an ideal hub for domestic travel, with 93% of its flights being domestic. This was especially prominent during the COVID-19 pandemic, which saw an increase in domestic travel due to international travel restrictions. DEN's location also allows it to connect the large coastal metros, a role previously held by ATL.
Additionally, DEN has invested in improving its operations and infrastructure. For example, they invested in new snow-removal equipment, reducing runway occupancy times for snow clearance from 45 minutes in 2006 to just 15 minutes, for which they were awarded the Balchen/Post award in 2020. The airport has also expanded its services, with Southwest Airlines entering in 2006 and rapidly expanding to become the second-largest carrier after United.
DEN's growth is reflected in its passenger numbers. In 2023, the airport's CEO, Phil Washington, forecasted 78 million passengers for the year, a significant increase from previous years. OAG, a global travel data provider, ranked DEN as the sixth busiest airport in the world in 2023, up from 21st in 2019.
While DEN is one of America's fastest-growing airports, it has limited international connectivity compared to other major US airports. It does not have direct routes to Asia or Europe, and most of its flights are domestic. However, its expansion plans and strategic location position it for continued growth in the future.
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Frequently asked questions
Hartsfield-Jackson Airport in Atlanta, Georgia, is the busiest airport in the world. It has held this rank for 26 out of the past 27 years and was the only airport to break the 100 million passenger count.
Shanghai's Pudong Airport has seen a 41% increase in traffic compared to 2023 levels, making it China's busiest airport.
Named after former Prime Minister Indira Gandhi, India's busiest airport opened a fourth runway in 2023 to accommodate booming demand.
Heathrow Airport in London, England, is Europe's busiest airline hub. However, it only has two runways, which operate at an estimated 98% capacity.


































