Which airport code represents New Orleans, Louisiana?

The airport code that represents New Orleans, Louisiana is MSY. This code stands for Louis Armstrong New Orleans International Airport, which serves as the primary airport for both domestic and international flights to and from the city. The designation "MSY" is derived from the airport's original name, Moisant Field, which pays homage to aviator John Moisant.

Other airport codes listed correspond to different airports: MDW is the code for Chicago Midway International Airport, DTW stands for Detroit Metropolitan Wayne County Airport, and MSP represents Minneapolis–Saint Paul International Airport. Each of these codes is unique to their respective airports and does not relate to New Orleans. This makes MSY the correct answer in identifying the airport code for New Orleans.