Francisco de Sá Carneiro Airport

Francisco de Sá Carneiro Airport carries the IATA code OPO — the three letters printed on boarding passes and baggage tags — and the ICAO code LPPR, used in flight plans and by air traffic control. It serves Porto, Portugal.

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.