Oakland San Francisco Bay Airport

Oakland San Francisco Bay Airport carries the IATA code OAK — the three letters printed on boarding passes and baggage tags — and the ICAO code KOAK, used in flight plans and by air traffic control. It serves Oakland, 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.