Heathrow remains the leading hub for global travellers and is also Europe’s busiest airport by seat capacity.
OAG Megahubs 2025 ranks the connectivity of the world’s busiest international airport hubs – globally and regionally – as well as gateways into domestic markets. These rankings are generated by comparing the number of scheduled connections to and from international flights with the number of destinations served from the airport.
The results are based on scheduled services to destinations operating between September 2024 and August 2025.
Heathrow is the only airport in the Global Top 10 to retain the same ranking as last year.
Istanbul Airport (IST) had one of the greatest increases, from eighth to second place. Amsterdam Schiphol (AMS) climbs to third place, up from fourth place last year.
Kuala Lumpur (KUL) is the highest-ranking Asian airport – in joint fourth place with Frankfurt (FRA).
FRA has climbed from 10th position last year to fourth, driven by a 21% increase in potential connections year-on-year.
Tokyo Haneda (HND) has dropped from third to ninth in 2025, reflecting a 10% decline in connections.
Atlanta Hartsfield-Jackson (ATL) – the world’s largest airport by seat capacity – re-enters the Top 10 this year rising from 11th to eighth.
KUL tops low-cost carrier (LCC) hubs
Low-cost megahubs highlight the growing strength of LCCs in shaping global connectivity, according to the OAG report.
Kuala Lumpur (KUL) remains the world’s most connected LCC megahub, holding onto the top spot.
Incheon (ICN) has risen from third to second place, swapping positions with Manila (MNL).
Hong Kong (HKG) has experienced the most impressive growth, moving up 20 places to fourth. Potential LCC connections at HKG has almost tripled, driven by HK Express, which added 15 new destinations in the past year.
