Western Sydney International (Nancy-Bird Walton) Airport

Western Sydney International (Nancy-Bird Walton) Airport carries the IATA code WSI — the three letters printed on boarding passes and baggage tags — and the ICAO code YSWS, used in flight plans and by air traffic control. It serves Sydney, 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.