Global aviation hubs are undergoing a major reshuffle due to the impact of geopolitical conflicts in the Middle East. According to preliminary statistics from the Airports Council International (ACI) on 1,234 airports worldwide, Seoul’s Incheon International Airport has claimed the title for the first time in the first half of this year (2026), becoming the airport with the largest international passenger throughput in the world.
At the same time, traditional aviation hub London Heathrow Airport has not only lost its top spot in international passenger traffic, but also been replaced by Istanbul Airport in Turkey as the total passenger champion in Europe.
Data shows that Incheon Airport welcomed a total of 38.39 million international passengers in the first 6 months of this year (a 6.3% increase year-on-year). London Heathrow Airport ranked second with 37.79 million passengers, while Singapore Changi Airport came in third with 34.53 million passengers. This marks the first time that Incheon Airport has taken the top spot in international passenger rankings since its opening in 2001. Looking back at its history, the airport was only ranked 10th globally in 2002, rose to 5th in 2018, and ranked 3rd in 2024 (70.67 million passengers).
Officials from Incheon International Airport Corporation (IIAC) analyze that the key to the surge in passenger traffic lies in the weakening of transfer hub functions in traditional Middle Eastern airports like Dubai following conflicts between the US and Iran. This has forced a significant portion of the aviation demand originally traveling between Dubai and Europe to shift to Incheon Airport.
This speculation is strongly supported by data: in the first half of this year, Incheon Airport saw a total of 4.24 million transfer passengers, a significant 18.1% increase compared to the same period last year. The most notable increase was in the number of transfer passengers on “Europe routes,” which surged by 63.2% annually to reach 210,000 passengers.
In addition to the influx of transfer passengers, the substantial growth in foreign tourists is also an important driving force. Statistics show that in the second quarter of this year, the proportion of foreign tourists at Incheon Airport reached a historic high of 44.4% of total passenger traffic.
Incheon Airport currently serves 101 airlines, flying to 183 cities worldwide (including 158 international destinations). The airport completed its fourth phase expansion project by the end of 2024, significantly increasing its annual passenger handling capacity to 106 million people, providing ample capacity for the surge in passenger traffic.
While Incheon Airport is rising, the iconic London Heathrow Airport in Europe is facing a double blow. Despite achieving a record-breaking total passenger traffic of 40 million in the first half of this year (including domestic and international), with a 7.9% growth in traffic to the Asia-Pacific region, the capacity to the Middle East has significantly dropped by 16.5% due to regional conflicts.
Furthermore, Heathrow Airport’s total passenger traffic dominance in Europe is also being challenged. According to data released this week for July, Istanbul Airport in Turkey surpassed Heathrow Airport as the largest airport in Europe in terms of total passenger traffic, with 8.15 million passengers in a single month compared to Heathrow’s 7.9 million passengers.