what is the approximate distance from the southern end of the st. lawrence river to duluth, minnesota?

The approximate distance from the southern end of the St. Lawrence River (where it meets the Atlantic Ocean) to Duluth, Minnesota, is about 2,342 statute miles (3,700 kilometers) or 2,038 nautical miles. This distance includes travel through the Great Lakes and the St. Lawrence Seaway system to reach Duluth on Lake Superior.