Singapore Changi Airport is the principal international airport serving the Republic of Singapore, and functions as one of the most significant aviation gateways in the Asia-Pacific region. Situated within the Changi planning area in the eastern part of the country, the airport is approximately 24 kilometres from the Downtown Core and occupies a site spanning about 25-square-kilometre (9.7 sq mi). The airport is a base for more than 100 international carriers with scheduled services linking Singapore to destinations across Asia, Oceania, Africa, Europe, the Middle East and North America. As of 2024, Changi Airport handled 67.7 million passengers, ranking it as the 15th busiest globally.