Massena International Airport Richards Field (MSS/KMSS) is a public-use general aviation and small commercial airport located in Massena, New York, in St. Lawrence County in the North Country region of the state. Situated near the St. Lawrence River and the U.S.-Canada border, the airport serves local residents and regional travelers in an area known for its proximity to the Akwesasne Mohawk Territory and industrial facilities including the former Alcoa aluminum plant. The airport has historically supported limited scheduled commercial service alongside general aviation operations, charter flights, and cargo activity. Its cross-border location gives it an international designation, though traffic volumes remain modest consistent with the rural community it serves.