Slidell Airport

Slidell Airport is a city-owned public-use airport located four nautical miles northwest of the central business district of Slidell, a city in St. Tammany Parish, Louisiana, United States.

Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned ASD by the FAA but has no designation from the IATA.

Source: Wikipedia