The study OAG Megahubs 2025 reveals the most connected airports in the world, both internationally and within the United States. It highlights the 50 most interconnected airports worldwide, the 25 most connected airports among low-cost airlines, the 25 main US domestic hubs, as well as the 10 most connected airports by major region: North America, Latin America, Asia-Pacific, Europe, Middle East and Africa. The analyses are based on 100 largest airports in the world based on total annual capacity (from 1 September 2024 to 31 August 2025).
Produced for the tenth consecutive year, this ranking assesses the connectivity of the major international hubs, both globally and regionally, while integrating the connections of domestic networks. OAG Megahubs 2025 offers a comprehensive overview of the evolution of air connectivity.
Europe still dominated by London Heathrow
Unsurprisingly London Heathrow (LHR) remains the most connected airport in the world and in Europe for the third year running. The London hub offers more than 59,000 possible connections to 226 destinations. Heathrow is the only airport to have maintained the same position in the world's Top 10 as last year, while all the other major hubs have seen their rankings change, either upwards or downwards.
In the top 10, Europe remains a heavyweight with 5 airports. The surprise comes from Istanbul airport. The airport has moved up from 8ᵉ to 2ᵉ place thanks to an increase in the number of flights. 25 % the number of possible connections. Frankfurt, along with Kuala Lumpur, is the 4th largest mega-hub in the world. The airport moved up six places to 21 % its connections.
Tokyo-Haneda (HND) falls from 3ᵉ to 9ᵉ position, with a drop of 10 % connections. In the United States, Atlanta Hartsfield-Jacksonthe world's largest airport by capacity, has returned to the Top 10 at number 8ᵉ thanks to eight new destinations and an increase of 14 % connections, while Chicago O'Hare (ORD) gains two places to move up to 7ᵉ place.
Paris CDG climbed to tenth place. Nonetheless, the French platform has lost four places in a decade. This fall is due to the transfer of many air routes to rail, in addition to the closure of domestic routes.
Ten years of evolution for mega-hubs
Rest of the world and low-cost
Elsewhere in the world, Chicago O'Hare (ORD) is back in first place ahead of Atlanta and Dallas/Fort Worth on US domestic routes. Whereas Denver climbs to 4ᵉ position, ahead of Charlotte.
The major Asian hubs confirm their strategic role in global connectivity. Kuala Lumpur establishes itself as the world's leading low-cost airportsupported by AirAsia. Seoul Incheon is up sharply, thanks to a 58 % increase in connections in ten years. Tokyo Haneda (HND) and Bangkok (BKK) also remain major regional hubs, despite a slight decline.
Asia-Pacific has also confirmed its supremacy in low-cost connectivity with 16 of the 25 most connected airports are served by low-cost airlines.
In addition to Kuala Lumpur and Seoul-Incheon (ICN), Manila, Hong Kong; Dubai (DXB) and Sydney follow. Europe's leading low-cost airport ranks eighth, in this case Istanbul Sabiha Gökçen International. The latter is located in the Asian part of the Turkish metropolis. Barcelona follows in 9th position, thanks in particular to the presence of Vueling.
