In May 2025, OAG ranked Singapore Changi Airport (SIN) as the fourth-busiest international airport in the world, based on international seat capacity. In that month, the airport offered 3.6 million international seats, placing it behind Dubai, London Heathrow, and Amsterdam, and ahead of Seoul Incheon and Istanbul. In 2024, the airport received around 68 million passengers, making it one of the most important hubs in the region.