The busiest airports in the world are not the most international ones, and the gap between those two statements is the most interesting thing in the data. Atlanta handled 106.3 million passengers in 2025, more than any other airport, and does not appear in the top twenty for international traffic at all.
Of the ten busiest airports overall, only three reach the international table. The ranking below gives both figures for each, which turns a list of large numbers into a description of what each airport is actually for.
Two Rankings That Barely Overlap
Airports Council International publishes separate tables for total and international passengers, and comparing them splits this list into three kinds of airport. All the figures here come from the Airports Council International rankings for 2025.
- Domestic connectors. Atlanta, Tokyo Haneda, Dallas Fort Worth, Shanghai Pudong, Chicago, Guangzhou and Denver. Enormous totals, no place in the international top twenty. Seven of the ten.
- International gateways. Dubai is first in the world for international traffic, Heathrow second and Istanbul sixth. These three appear in both tables.
- Dubai alone. Its total and its international figure are the same number, 95,192,160, because effectively everyone it handles is crossing a border.
The explanation is the hub and spoke model applied to countries of different sizes. A large country with a big internal market generates enormous domestic traffic that never crosses a border, and its hubs fill up with passengers changing planes.
A small country with a well-placed airport has to import its traffic, and the result is an airport whose business is almost entirely international. That is Dubai, and to a lesser degree Heathrow and Istanbul.
Busiest Airports in the World: Passengers and International Rank
The ten busiest by total traffic in 2025, with their position in the separate international ranking.
| # | Airport | Passengers 2025 | Change | International rank |
|---|---|---|---|---|
| 1 | Hartsfield-Jackson Atlanta (ATL) | 106,302,208 | -1.6% | Outside the top 20 |
| 2 | Dubai International (DXB) | 95,192,160 | +3.1% | No. 1 in the world |
| 3 | Tokyo Haneda (HND) | 91,679,814 | +6.7% | Outside the top 20 |
| 4 | Dallas Fort Worth (DFW) | 85,660,127 | -2.5% | Outside the top 20 |
| 5 | Shanghai Pudong (PVG) | 84,994,548 | +10.7% | Outside the top 20 |
| 6 | Chicago O’Hare (ORD) | 84,856,018 | +6.0% | Outside the top 20 |
| 7 | London Heathrow (LHR) | 84,482,126 | +0.7% | No. 2 in the world |
| 8 | Istanbul (IST) | 84,437,710 | +5.5% | No. 6 in the world |
| 9 | Guangzhou Baiyun (CAN) | 83,582,952 | +9.5% | Outside the top 20 |
| 10 | Denver (DEN) | 82,427,962 | +0.1% | Outside the top 20 |
The 10 Busiest Airports, Ranked by Total Passengers
Each entry gives the total, the change on 2024, and where the airport sits in the separate international ranking.
1. Hartsfield-Jackson Atlanta International: 106,302,208 passengers
Passengers 2025: 106,302,208 · Change on 2024: -1.6% · International rank: Outside the top 20 · International passengers: Not ranked
Atlanta has been the world’s busiest airport for most of the past three decades, handling 106.3 million passengers in 2025. It is the only airport to pass one hundred million.
What it is not is an international gateway. Atlanta does not appear in ACI’s top twenty for international traffic at all. Its volume comes from being the connecting point of a vast domestic network, where passengers change planes rather than countries.
Traffic fell 1.6 percent in 2025, one of only three declines in this top ten.
2. Dubai International: 95,192,160 passengers
Passengers 2025: 95,192,160 · Change on 2024: +3.1% · International rank: No. 1 in the world · International passengers: 95,192,160
Dubai handled 95.2 million passengers and is second overall. It is also first in the world for international traffic, with exactly the same figure.
That identity between the two numbers is the striking fact about Dubai: every passenger it handles is international. No other airport in this top ten comes close to that profile.
It grew 3.1 percent in 2025 and is 10.2 percent above its 2019 level, a stronger recovery than most of the airports above and below it.
3. Tokyo Haneda: 91,679,814 passengers
Passengers 2025: 91,679,814 · Change on 2024: +6.7% · International rank: Outside the top 20 · International passengers: Not ranked
Haneda climbed to third with 91.7 million passengers, growing 6.7 percent in 2025, the second fastest rate in this top ten.
Like Atlanta it is largely domestic, serving Japan’s dense internal network, and it does not reach the international top twenty. Tokyo’s international traffic is split with Narita, which is part of the explanation.
Its rise reflects the wider recovery of air travel across the Asia-Pacific region, which lagged other markets after 2020 and has been catching up since.
4. Dallas Fort Worth: 85,660,127 passengers
Passengers 2025: 85,660,127 · Change on 2024: -2.5% · International rank: Outside the top 20 · International passengers: Not ranked
Dallas Fort Worth handled 85.7 million passengers, fourth overall, with traffic down 2.5 percent in 2025.
It is 14.1 percent above its 2019 level nonetheless, the second largest gain against pre-2020 traffic in this group, and it is another of the large American connecting hubs that does not feature in the international ranking.
The combination of a decline against 2024 and a large gain against 2019 describes an airport that grew very fast and has now levelled off.
5. Shanghai Pudong: 84,994,548 passengers
Passengers 2025: 84,994,548 · Change on 2024: +10.7% · International rank: Outside the top 20 · International passengers: Not ranked
Shanghai Pudong handled 85.0 million passengers and grew 10.7 percent, the fastest growth rate of any airport in this top ten.
That rate is the clearest single indicator of where traffic is moving. China’s international and domestic travel both resumed later than the rest of the world, and Pudong is still closing the gap.
It does not appear in the international top twenty, though its international share is considerably larger than the American hubs in this list.
6. Chicago O’Hare: 84,856,018 passengers
Passengers 2025: 84,856,018 · Change on 2024: +6.0% · International rank: Outside the top 20 · International passengers: Not ranked
O’Hare handled 84.9 million passengers, sixth, and grew 6.0 percent in 2025.
It is the third American airport in the top six and follows the same pattern as the other two: enormous total volume, no place in the international rankings, and a business built on connecting domestic passengers.
Four of the ten busiest airports in the world are in the United States, which says more about the size of the American domestic market than about international travel.
7. London Heathrow: 84,482,126 passengers
Passengers 2025: 84,482,126 · Change on 2024: +0.7% · International rank: No. 2 in the world · International passengers: 79,874,784
Heathrow handled 84.5 million passengers, seventh overall and second in the world for international traffic at 79.9 million.
That makes it the most internationally weighted major airport after Dubai: 95 percent of its passengers are flying to or from another country. Britain’s domestic air market is small and the airport is capacity constrained, so the slots go to long-haul.
Growth of 0.7 percent is the slowest in this top ten, which is what a single-runway-pair airport operating at its limit looks like.
8. Istanbul: 84,437,710 passengers
Passengers 2025: 84,437,710 · Change on 2024: +5.5% · International rank: No. 6 in the world · International passengers: 66,608,849
Istanbul handled 84.4 million passengers, eighth overall and sixth for international traffic at 66.6 million.
It is one of only three airports in this top ten to appear in both rankings, and it was purpose-built as a transfer hub between Europe, Asia and Africa, opening in 2018 to replace the older Ataturk airport.
Growth of 5.5 percent in 2025 continues the pattern since it opened.
9. Guangzhou Baiyun: 83,582,952 passengers
Passengers 2025: 83,582,952 · Change on 2024: +9.5% · International rank: Outside the top 20 · International passengers: Not ranked
Guangzhou Baiyun handled 83.6 million passengers, ninth, growing 9.5 percent, the second fastest rate here.
It serves the Pearl River Delta, one of the most economically dense regions on earth, and competes for that traffic with Hong Kong and Shenzhen.
Like Shanghai it is still recovering ground rather than setting records, which is why its growth rate sits so far above the global average of 3.7 percent.
10. Denver: 82,427,962 passengers
Passengers 2025: 82,427,962 · Change on 2024: +0.1% · International rank: Outside the top 20 · International passengers: Not ranked
Denver handled 82.4 million passengers, tenth, with growth of 0.1 percent, effectively flat.
It is the fourth American airport in this list and the largest by land area of any airport in the United States, which is the reason it has room to expand where other hubs do not.
Its position illustrates how concentrated this ranking is: the gap from seventh to tenth is about two million passengers, close enough that a single year’s movement can reorder them.
Only One Airport Passes a Hundred Million
Atlanta handled 106.3 million passengers. No other airport reached a hundred million, and Dubai in second place is eleven million behind.
Below the top two the field compresses sharply. Places four to ten are separated by about three million passengers in total, which is less than four percent. Dallas Fort Worth at 85.7 million and Denver at 82.4 million are closer together than the headline ranking suggests.
That compression means the order below third place is not stable. A single year’s movement, or a construction programme closing a runway, can reorder several positions without anything fundamental changing.
It also means the gap between first and second is the only durable feature of the top of this list. Atlanta has held first place for most of the past three decades.
Where the Growth Is, and Where It Has Stopped
Global passenger traffic reached an estimated 9.8 billion in 2025, up 3.7 percent on 2024 and 6.5 percent above 2019. Within this top ten the spread around that average is wide.
Shanghai Pudong grew 10.7 percent and Guangzhou Baiyun 9.5 percent, both far above the global rate. Chinese traffic resumed later than the rest of the world and is still closing the gap rather than setting new records.
At the other end, Heathrow grew 0.7 percent and Denver 0.1 percent. Neither is a weak airport; both are operating close to their physical limits, and an airport without spare runway or terminal capacity cannot grow regardless of demand.
Three declined: Atlanta at minus 1.6 percent and Dallas Fort Worth at minus 2.5. Both remain well above their 2019 levels, which describes an airport that expanded quickly and has now settled.
Why the United States Takes Four Places
Atlanta, Dallas Fort Worth, Chicago and Denver are all in the top ten, and none of them appears in the international ranking. That combination describes the American aviation market precisely.
The country is large enough that a flight from one side to the other is longer than most international journeys in Europe, and its airlines built networks around a few enormous connecting hubs rather than point to point services.
The consequence is that a large share of the passengers counted at these airports never leave the terminal. They arrive, walk to another gate and depart, and they are counted at each end.
Europe shows the opposite structure. Heathrow is the only European airport in this top ten, and it is second in the world for international traffic, because the continent’s short internal distances push domestic journeys onto trains and roads.
Frequently Asked Questions
What is the busiest airport in the world?
Hartsfield-Jackson Atlanta, with 106.3 million passengers in 2025. It is the only airport to pass a hundred million and has held the position for most of the past three decades, almost entirely on domestic connecting traffic.
Which airport handles the most international passengers?
Dubai International, with 95.2 million. That is also its total figure, because effectively every passenger it handles is crossing a border. London Heathrow is second at 79.9 million and Incheon third.
Why is Atlanta busier than Dubai or Heathrow?
Because it connects a very large domestic market. American airlines route passengers through a small number of hubs, and each connecting passenger is counted twice, once arriving and once departing, without ever crossing a border.
How many of the busiest airports are in the United States?
Four of the top ten: Atlanta, Dallas Fort Worth, Chicago O’Hare and Denver. None of them appears in the international top twenty, which is the clearest illustration of how domestic the American market is.
