Seoul Incheon Airport Ranks Sixth Worldwide for International Connectivity

Seoul Incheon International Airport (ICN) has been ranked the world’s sixth most internationally connected airport, retaining its position from last year and reaffirming its status as one of Asia’s leading global aviation hubs.

According to Megahubs 2026, released by aviation data and intelligence company OAG on September 16, Incheon recorded a connectivity index score of 221.7 to place sixth globally.

The airport offered 43,887 potential international connections across a network of 198 destinations. It also recorded 44.3 million scheduled seats between September 2025 and August 2026.

Korean Air was the largest carrier at Incheon, accounting for 22% of the airport’s scheduled capacity. The relatively modest share held by the dominant airline indicates that Incheon’s international network is supported by a broad range of carriers.

Istanbul Airport (IST) took first place globally for the first time, moving up from second in 2025. The airport connects passengers to 337 destinations worldwide, while Turkish Airlines operates 80% of its flights.

London Heathrow Airport (LHR) moved into second place after the number of potential connections available on the busiest day fell by 6% year on year. Ongoing disruption to flight schedules in the Middle East was among the factors affecting its connectivity.

This year’s rankings were inevitably influenced by the continuing disruption in the Middle East. Scheduled capacity in the region was 5.7% lower in August 2026 than in August 2025.

The decline led to changes in the rankings of major Middle Eastern hubs, including Dubai International Airport (DXB) and Hamad International Airport in Doha (DOH), as well as several other airports that previously had high levels of connectivity with the region.

Amsterdam Airport Schiphol (AMS) retained third place, recording growth in both potential connections and the number of destinations served.

Kuala Lumpur International Airport (KUL) remained fourth globally and was the highest-ranked airport in Asia. The number of destinations served by the airport increased to 154.

Chicago O’Hare International Airport (ORD) climbed from seventh place in 2025 to fifth this year, making it the most connected airport in the Americas. Potential connections increased by 9.8%, while the number of destinations served rose from 297 to 308.

This gave Chicago the third-largest international destination network in the world, behind Istanbul with 337 destinations and Frankfurt with 310.

Asia-Pacific airports occupied eight of the top 20 positions in the 2026 global ranking. Chinese airports recorded particularly notable gains as the country’s aviation market completed its post-pandemic recovery.

Shanghai Pudong International Airport (PVG) rose from 19th to 14th place, while Guangzhou Baiyun International Airport (CAN) climbed from 36th to 19th. Hong Kong International Airport (HKG) returned to the global top 20, moving up from 22nd to 20th.

In the Low-Cost Carrier Megahubs Index, Kuala Lumpur ranked first with nearly 15,000 potential low-cost connections.

Asia-Pacific accounted for 64% of the top 25 airports in the LCC ranking. Low-cost carriers represented 51% of all scheduled seats across Southeast Asia, significantly higher than the global average of 34%.

John Grant, chief analyst at OAG, said the 2026 rankings reflected a global aviation market that was still recalibrating after a period of significant disruption.

“Istanbul’s rise to the top reflects the strength of Turkish Airlines’ network and the airport’s geographic position as a connecting hub between east and west,” Grant said.

“The recovery of Chinese airports is equally significant. The data suggests the post-pandemic adjustment in that market is now complete.”

Selahattin Bilgen, chief executive officer of iGA Istanbul Airport, said being recognised as the world’s most connected airport was a significant achievement for the airport and those who had contributed to its growth.

He said the result reflected the airport’s strategic development, Istanbul’s geographical position and the extensive global network operated by Turkish Airlines.