Long Island is represented by which airport code?

Long Island is represented by the airport code ISP, which stands for Long Island MacArthur Airport. This airport serves as a primary gateway to the Long Island area and is situated in Suffolk County. The selection of ISP as the correct answer is significant because it corresponds directly to the geographical location and the specific airport known for serving passengers traveling to and from Long Island.

In contrast, the other codes represent different airports in other regions: MDW is for Midway International Airport in Chicago, MKE is for General Mitchell International Airport in Milwaukee, and MSO is for Missoula International Airport in Montana. Each of these codes relates to airports that are not located in Long Island, reinforcing why they do not apply to the question regarding Long Island's representation.