Incheon International Airport Ranks First Globally in International Passenger Traffic

Incheon International Airport became the world's busiest airport for international passengers in the first half of the year, handling 38.39 million passengers. This marks the first time the main gateway to Seoul has topped the global rankings since it opened in 2001. According to preliminary statistics from the Airports Council International, Incheon surpassed London Heathrow Airport, which recorded 37.79 million international passengers, and Singapore's Changi Airport, which handled 34.53 million.

International passenger traffic at Incheon rose 6.3 percent compared to the previous year. The airport operator, Incheon International Airport Corp. (IIAC), noted that the number of transfer passengers grew by 18.1 percent to 4.24 million, with European route transfers surging 63.2 percent. Foreign passengers reached a record 44.4 percent of total traffic in the second quarter. The airport has expanded its capacity to 106 million passengers annually following a four phase expansion completed in late 2024.

Both reports attribute part of this growth to geopolitical instability. A center leaning source and a center left leaning source both note that the U.S. Iran conflict weakened Middle Eastern hubs like Dubai, diverting transit traffic to Incheon. While the center leaning source focuses on the shift in travel demand, the center left leaning source frames the event as the airport becoming the busiest specifically amid the Iran war.

Additional data indicates that Heathrow recorded 40 million total passengers including domestic travel, though its capacity to the Middle East fell 16.5 percent. Meanwhile, South Korea also claims the world's busiest air route between Gimpo airport and Jeju island, which had 14.4 million seats scheduled in 2025.