The IATA code for Singapore Changi Airport is SIN.
Singapore Changi Airport is Singapore’s principal international airport and one of Asia’s major aviation hubs. It opened for commercial operations in 1981, replacing the older Paya Lebar Airport as Singapore’s main civilian gateway.
The code SIN is associated with Singapore and is used in passenger reservations, baggage tags, timetables, and airport displays. IATA codes are designed primarily for commercial and passenger-facing purposes, while ICAO codes are used more often in flight planning and air-traffic operations. Changi’s ICAO code is WSSS.
SIN can be confused with nearby Asian airport codes such as KUL for Kuala Lumpur, BKK for Bangkok, and HKG for Hong Kong. Singapore Changi is also the home hub of Singapore Airlines, although an airport code identifies the airport rather than a particular airline.