Sydney Kingsford Smith International Airport

Sydney Kingsford Smith International Airport carries the IATA code SYD — the three letters printed on boarding passes and baggage tags — and the ICAO code YSSY, used in flight plans and by air traffic control. It serves Sydney (Mascot), Australia.

IATA codes are assigned by the International Air Transport Association for passenger-facing use; the four-letter ICAO code encodes region and country and belongs to the operational side of aviation.