Louis Armstrong New Orleans International Airport (IATA: MSY, ICAO: KMSY, FAA LID: MSY) is a Class B public use international airport in Jefferson Parish, Louisiana, United States. It is owned by the City of New Orleans and is located 10 nautical miles (19 km) west of its central business district. The airport's address is 900 Airline Drive in Kenner, Louisiana. A small portion of Runway 10/28 is located in unincorporated St. Charles Parish. Armstrong International is the primary commercial airport for the New Orleans metropolitan area and southeast Louisiana. The airport was formerly known as Moisant Field, and it is also known as Louis Armstrong International Airport and New Orleans International Airport.
Sitting at an average of 4.5 feet (1.4 m) above sea level, MSY is the 2nd lowest-lying international airport in the world, behind only Amsterdam's Schiphol International Airport in the Netherlands, which lies eleven feet below sea level. Prior to Hurricane Katrina, MSY served 9.7 million passengers per year, nearly all of them non-connecting. In 2009, it served 7,781,678 passengers, representing a decrease of 2.3% over the previous year.
In February 2008, U.S. News & World Report ranked the travel experience at MSY 4th of the 47 busiest United States airports based upon the relatively small number of flight delays and frequently lower onboard flight loads.
Louis Armstrong New Orleans International Airport was once a major gateway for Latin American travel from the United States. That travel now mostly goes through other cities which serve as hubs for international legacy airlines.
MSY opened after World War II, replacing the older New Orleans Lakefront Airport (which kept the NEW and KNEW airport codes and now serves general aviation) as the city's main airport. MSY was renamed in 2001 after Louis Armstrong, a famous jazz musician from New Orleans. The National Weather Service forecast office for the area was once located at MSY, but has moved to the suburb of Slidell, and now uses the non-airport codes LIX and KLIX.