Incheon Airport Now Busiest

South Korea's Incheon airport has become the world's busiest airport for international passengers, handling 38.39 million international passengers in the first half of 2026. This surge in traffic is partly due to the disruption in the Middle East caused by the Iran war, which has redirected traffic away from key hubs like Dubai and increased passenger numbers on routes through East Asia.

Incheon airport's international passenger traffic was up 6.3% year on year overall, with rising numbers of foreign visitors also contributing to the increase. The airport serves 101 airlines flying to 183 cities, including 158 international destinations. An expansion project completed in 2024 increased Incheon airport's annual capacity to 106 million passengers.

Heathrow airport ranked second with 37.79 million international passengers in the first half of 2026, followed by Changi airport in Singapore with 34.53 million. The number of transfer passengers at Incheon airport rose 18.1% to 4.24 million in the first half of 2026, with the number of transfer passengers with final destinations in Europe surging 63.2% year on year to 210,000.

## Why it matters The Iran war has significantly impacted global air travel, with the conflict causing disruption to key hubs in the Middle East. As a result, airports in East Asia, such as Incheon, have seen an increase in traffic. This shift in global air travel patterns has significant implications for the aviation industry, with airports and airlines needing to adapt to changing demand.

The increase in traffic at Incheon airport is also driven by rising numbers of foreign visitors to South Korea. Foreigners accounted for 39.3% of Incheon's passengers in the first half of the year, up from 35.2% for the whole of 2025. This growth in international tourism has significant economic implications for South Korea, with the tourism industry playing a major role in the country's economy.

## What happens next As the Iran war continues to impact global air travel, it is likely that airports in East Asia will continue to see an increase in traffic. Incheon airport's expansion project, which increased its annual capacity to 106 million passengers, will help the airport to handle the growing number of passengers. However, the airport will need to continue to adapt to changing demand and invest in infrastructure to maintain its position as the world's busiest airport for international traffic.

Incheon airport's success is also a testament to South Korea's growing importance as a global hub. The airport's strategic location and state-of-the-art facilities make it an attractive option for travelers and airlines alike. As the aviation industry continues to evolve, it is likely that Incheon airport will play an increasingly important role in global air travel.