Dubai International Airport served 95,192,160 passengers in 2025, a 3.1 percent increase on the year, holding its position as the world's second-busiest airport and remaining the busiest for international travel, since virtually all of its scheduled traffic crosses national borders.
Atlanta's Hartsfield-Jackson International Airport stayed in first place globally with 106,302,208 passengers, even as its traffic fell 1.6 percent from more than 108 million in 2024. Atlanta held the top global spot for 22 consecutive years before pandemic disruptions cost it the title in 2020. It reclaimed first place in 2021 and has kept it ever since.
Where Dubai stands globally
Tokyo Haneda moved into third place worldwide with 91,679,814 passengers, up 6.7 percent. Dallas Fort Worth ranked fourth with 85,660,127 passengers, followed by Shanghai Pudong with 84,994,548 and Chicago O'Hare with 84,856,018. Heathrow placed seventh for the full year with 84,482,126 passengers, narrowly ahead of Istanbul Airport in eighth with 84,437,710 — a gap of roughly 44,000 travelers. Guangzhou Baiyun and Denver rounded out the top ten.
Dubai's start to 2026 has been rougher. The airport handled 18.6 million passengers in the first quarter, down 20.6 percent from the same period in 2025, a drop attributed to flight restrictions tied to the U.S.-Iran war.
Istanbul overtakes Heathrow
While Heathrow kept the annual title for Europe's busiest airport through 2025, the picture shifted by mid-2026. In July, Istanbul handled 8.15 million passengers against Heathrow's 7.86 million, making it Europe's busiest airport for that month. Heathrow's July traffic fell 1.5 percent year on year, while Istanbul grew 2.3 percent. Heathrow's Middle East route traffic dropped 20.2 percent annually because of regional conflict.
The trend had already been tightening earlier in the year. In May 2026, Heathrow led Istanbul by just 3,012 passengers, with both airports serving about 7.12 million travelers each. Heathrow's May traffic fell 1.2 percent from a year earlier, while Istanbul rose 2 percent.
Heathrow was Europe's busiest airport continuously from 1996 through 2019, lost the position during the 2020 pandemic collapse, regained it in 2023 and held the annual crown through 2025. Heathrow's chief executive, Thomas Woldbye, said in February that Istanbul could overtake London on an annual basis in 2026 or 2027.
Capacity constraints are part of the story. Heathrow operates two runways that are near full capacity and is seeking approval for a third, under a privately financed £21 billion proposal that would raise annual capacity to 150 million passengers. Transport Secretary Heidi Alexander opened a consultation in June on the Heathrow Expansion National Policy Statement. In the meantime, Heathrow expects to serve 85 million passengers in 2026, relying on larger aircraft to squeeze out limited growth without additional runway slots, and projects its full-year total will decline 1.1 percent from 2025.
Istanbul offered 4.69 million scheduled seats in July compared with Heathrow's 4.49 million. Atlanta led global seat capacity with 5.58 million, while Dubai remained the largest international airport by seat count, with 4.35 million international seats.