Changi Airport Terminal 4

Changi Airport is Singapore's primary international airport and a major aviation hub in the Asia-Pacific region. It is one of the commercial airports in Singapore, the other being Seletar Airport. Since the rankings for the World's Best Airport by Skytrax began in 1999, the airport was classified as the world's best twelve times, including for eight consecutive years from 2013 to 2021.

The infrastructure of Changi Airport includes passenger terminals, runways, taxiways, maintenance buildings and services, and ground support equipment. Its four current passenger terminals can handle 82 million passengers a year. When Terminal 5 is completed, it is expected to handle an additional 50 million passengers per year.