IATA · ICAO
San Francisco International Airport
· filed 2026-07-18 · click a code to copy
San Francisco International Airport carries the IATA code SFO — the three letters printed on boarding passes and baggage tags — and the ICAO code KSFO, used in flight plans and by air traffic control. It serves San Francisco, United States.
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.