Sit on the Left side of the plane for the best views on flights from Seattle to Montreal. Left side wins both ends of the flight. During the route itself, a left-side seat also faces generally north and northwest, giving better views of the Canadian Rockies foothills and the boreal lake country of Ontario as the flight tracks northeast across Canada.

During takeoff from Seattle Tacoma International (SEA), sit on the Left side for the best views. SeaTac's primary departure runways (16L/16R) head southbound, then aircraft typically turn northeast toward Canada. A left-side seat captures Elliott Bay, downtown Seattle, and the Olympic Peninsula across Puget Sound during the initial climb and turn. The right side faces east toward the Cascades but the urban waterfront panorama on the left is more dramatic at low altitude. Notable sights include: Elliott Bay and downtown Seattle skyline, Puget Sound, Olympic Mountains across the water, Lake Washington.

When landing at Montreal International Dorval (YUL), sit on the Left side for the best views. Montreal's primary landing approach on runway 24L/24R brings aircraft in from the east over the St. Lawrence River. A left-side seat on approach gives a clear view of the St. Lawrence, the island of Montreal, and the city grid including Mount Royal. The right side faces south toward the flat farmland of the South Shore. Notable sights include: St. Lawrence River, Island of Montreal, Mount Royal, Old Montreal waterfront.

The flight from Seattle Tacoma International (SEA) to Montreal International Dorval (YUL) takes Approximately 4 hours 30 minutes to 5 hours.

The flight tracks northeast across British Columbia and Alberta, passing north of the Canadian Rockies with views of the Rocky Mountain foothills and the vast boreal forest of Saskatchewan and Manitoba. Over Ontario, the Canadian Shield dominates with thousands of lakes visible in the Precambrian rock terrain. The Ottawa River valley becomes visible on descent toward Montreal.