The Port of Montreal is a cruise and transshipment point. It is located on the St. Lawrence River in Montreal, Québec, Canada. The port operates as an international container port. It services Toronto, the rest of Central Canada, the Midwestern United States, and the Northeastern United States. Though found on the Saint Lawrence Seaway, it is some 1,600 miles (2,600 km) inland from the Atlantic Ocean and it is on the shortest direct route between the North American Midwest and Europe or the Mediterranean.

The St. Lawrence Seaway is a system of locks, canals, and channels in Canada and the United States that permits oceangoing vessels to travel from the Atlantic Ocean to the Great Lakes of North America, as far inland as Duluth, Minnesota, at the western end of Lake Superior. The seaway is named for the St. Lawrence River, which flows from Lake Ontario to the Atlantic Ocean. Legally, the seaway extends from Montreal, Quebec, to Lake Erie, and includes the Welland Canal. Ships from the Atlantic Ocean are able to reach ports in all five of the Great Lakes, via the Great Lakes Waterway.