John Wayne Orange County International Airport

John Wayne Orange County International Airport carries the IATA code SNA — the three letters printed on boarding passes and baggage tags — and the ICAO code KSNA, used in flight plans and by air traffic control. It serves Santa Ana, 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.