Louis Armstrong New Orleans International Airport

Louis Armstrong New Orleans International Airport carries the IATA code MSY — the three letters printed on boarding passes and baggage tags — and the ICAO code KMSY, used in flight plans and by air traffic control. It serves New Orleans, 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.