Biggest Airports in the World
The Biggest Airports in the World: Largest by Size and Busiest by Passengers
When people ask which are the biggest airports in the world, they’re really asking one of two questions — because “biggest” can mean two very different things. An airport can be the biggest by land area (the physical size of the site) or the biggest by passenger traffic (how many travellers pass through). The two lists look nothing alike.
The biggest airport in the world by land area is King Fahd International Airport (DMM) in Dammam, Saudi Arabia, covering a staggering 776 square kilometres — roughly the size of New York City. Yet it handles only around 12 million passengers a year. The busiest airport in the world, by contrast, is Hartsfield-Jackson Atlanta International Airport (ATL) in the USA, which moved 108.1 million passengers in 2024 on a footprint less than one-fortieth the size of King Fahd.
Below we rank both — the top 10 largest airports by size, and the top 10 busiest by passengers — using the latest full-year (2024) figures.
Biggest Airports in the World by Land Area
Measured by the sheer size of the site, these are the giants. (Land-area figures vary slightly between sources, as some include buffer land and future development zones, but the order of the top few is well established.)
| Rank | Airport | Country | Land Area |
|---|---|---|---|
| 1 | King Fahd International (DMM) | Saudi Arabia | ~776 km² (300 sq mi) |
| 2 | Denver International (DEN) | USA | ~135.7 km² (52.4 sq mi) |
| 3 | Istanbul Airport (IST) | Turkey | ~76.5 km² (29.5 sq mi) |
| 4 | Dallas/Fort Worth International (DFW) | USA | ~69.6 km² (26.9 sq mi) |
| 5 | Orlando International (MCO) | USA | ~53.8 km² (20.8 sq mi) |
| 6 | Washington Dulles International (IAD) | USA | ~48.6 km² (18.8 sq mi) |
| 7 | Beijing Daxing International (PKX) | China | ~47 km² (18.1 sq mi) |
| 8 | Cairo International (CAI) | Egypt | ~37 km² (14.3 sq mi) |
| 9 | Suvarnabhumi Airport (BKK) | Thailand | ~32.4 km² (12.5 sq mi) |
| 10 | Chicago O’Hare International (ORD) | USA | ~30.9 km² (11.9 sq mi) |
King Fahd International (Saudi Arabia) is in a league of its own — its 776 km² site dwarfs every other airport on Earth. Read our full guide to the No.1 Biggest Airport in the World.
Denver International (USA) is the second-largest airport in the world by land area and the biggest airport in the USA, spread across 135.7 km² of the Colorado plains — room enough for six runways and future expansion.
Istanbul Airport (Turkey) is Europe’s largest airport by area and one of its busiest, built as a mega-hub connecting three continents.
Busiest Airports in the World by Passengers (2024)
Measured by passenger traffic, the ranking flips completely. These are the airports that move the most people, based on ACI World’s final 2024 figures.
| Rank | Airport | Country | Passengers (2024) |
|---|---|---|---|
| 1 | Hartsfield-Jackson Atlanta (ATL) | USA | 108.1 million |
| 2 | Dubai International (DXB) | UAE | 92.3 million |
| 3 | Dallas/Fort Worth (DFW) | USA | 87.8 million |
| 4 | Tokyo Haneda (HND) | Japan | 85.9 million |
| 5 | London Heathrow (LHR) | UK | 83.9 million |
| 6 | Denver International (DEN) | USA | 82.4 million |
| 7 | Istanbul Airport (IST) | Turkey | 80.1 million |
| 8 | Chicago O’Hare (ORD) | USA | 80.0 million |
| 9 | Delhi (DEL) | India | 77.8 million |
| 10 | Shanghai Pudong (PVG) | China | 76.8 million |
Hartsfield-Jackson Atlanta (USA) has been the busiest airport in the world for years, thanks to its role as Delta Air Lines’ mega-hub and its central US location — over 108 million passengers passed through in 2024. Dubai International (UAE) remains the busiest airport for international passengers, while London Heathrow is Europe’s busiest. For the full US picture, see the biggest airports in the USA, and for the UK capital, the 6 biggest airports in London.
Biggest vs Busiest Airport: What's the Difference?
It’s the single most common point of confusion. Here’s the simple rule:
- Biggest = land area. The physical size of the airport site. Winner: King Fahd (776 km²).
- Busiest = passenger traffic. The number of travellers per year. Winner: Atlanta (108.1 million).
A huge airport isn’t necessarily busy, and a busy airport isn’t necessarily huge. Atlanta moves nearly ten times King Fahd’s passengers on a fraction of the land, while King Fahd’s vast site sees relatively few flights. That’s why every ranking needs to say how it’s measuring “biggest.”
Biggest Airport by Region
- Biggest airport in the USA: Denver International (by land area) / Atlanta (by passengers) — see our full USA airports guide.
- Biggest airport in Europe: Istanbul Airport (by area) / London Heathrow (by passengers) — explore Europe’s biggest airports.
- Biggest airport in the Middle East: King Fahd (by area) / Dubai International (by passengers).
- Biggest airport in Asia: Beijing Daxing and Bangkok Suvarnabhumi lead by area; Tokyo Haneda and Shanghai Pudong by passengers.
Frequently Asked Questions
What is the biggest airport in the world?
The biggest airport in the world by land area is King Fahd International Airport (DMM) in Dammam, Saudi Arabia, covering roughly 776 square kilometres — about the size of New York City. By passenger traffic, the biggest (busiest) is Hartsfield-Jackson Atlanta International Airport, with 108.1 million passengers in 2024.
What is the largest airport in the world by area?
King Fahd International Airport in Saudi Arabia is the largest airport in the world by area at about 776 km². The second largest is Denver International Airport in the USA at roughly 135.7 km².
What is the busiest airport in the world?
Hartsfield-Jackson Atlanta International Airport (ATL) is the busiest airport in the world, handling 108.1 million passengers in 2024 — more than any other airport. Dubai International is the busiest for international passengers.
Which country has the biggest airport?
Saudi Arabia has the biggest airport in the world by land area (King Fahd International). The United States has the most airports in the world’s top 10 for both size and passenger traffic.
What is the biggest airport in the USA?
Denver International Airport is the biggest in the USA by land area (135.7 km²), while Hartsfield-Jackson Atlanta is the busiest by passengers.
What will be the biggest airport in the world in the future?
Dubai’s Al Maktoum International Airport (DWC) is being expanded into what is planned to be the world’s largest airport by capacity, eventually designed to handle up to 260 million passengers a year.
Final Boarding Call
So, which is the biggest airport in the world? It depends on how you measure it. King Fahd International wins on sheer size, while Atlanta wins on passengers — and airports like Denver, Dubai, and Istanbul appear near the top of both lists, proving they’re giants by any measure. Whether you’re chasing records or planning a trip, these are the airports shaping global air travel.
Explore more in our guide to the biggest airports by country.