What airport code is used for Madison, Wisconsin?

The airport code for Madison, Wisconsin, is MSN. This code is designated by the International Air Transport Association (IATA) and is used for identifying the Dane County Regional Airport, which serves the city. Each airport has a unique three-letter code to facilitate ticketing, baggage handling, and travel planning.

In this case, the other options represent different airports in other locations: MDW is the code for Chicago Midway International Airport, GSO is for Piedmont Triad International Airport in Greensboro, North Carolina, and LFT refers to Lafayette Regional Airport in Louisiana. Each of these codes is specific to their respective airports and regions, making MSN the correct choice for Madison.