Sit on the Left side of the plane for the best views on flights from Washington to Montreal. The left side delivers the better views at both ends of the flight — the Blue Ridge on departure and the St. Lawrence River plus Mount Royal on approach. Along the cruise portion heading northeast, the left side also faces toward the Adirondack Mountains of upstate New York and the Lake Champlain valley, which are the most visually distinctive features of the mid-flight segment.

During takeoff from Washington Dulles International (IAD), sit on the Left side for the best views. Dulles typically departs eastbound on runway 01R/19L or 01L/19R. A northeastbound departure on runway 01R puts the left side facing west and northwest, giving views over the Virginia suburbs toward the Blue Ridge Mountains on the horizon. The Potomac River and the broader DC metro area also swing into view on the left as the aircraft banks northeast. Notable sights include: Blue Ridge Mountains (distant western horizon), Potomac River valley, Dulles Toll Road corridor below, Tysons Corner urban cluster.

When landing at Montreal International Dorval (YUL), sit on the Left side for the best views. Montreal Dorval typically lands on runway 24L or 06R depending on wind. An approach from the east on runway 24L brings aircraft in from the southeast over the St. Lawrence River, and the left side faces south toward the river and the broad flat agricultural plain of the Montérégie. The left side also picks up the Montreal city skyline and Mount Royal as the aircraft descends over the island. Notable sights include: St. Lawrence River, Mount Royal (Mont Royal), Montreal downtown skyline, Île de Montréal agricultural and urban grid.

The flight from Washington Dulles International (IAD) to Montreal International Dorval (YUL) takes Approximately 1 hour 20 minutes to 1 hour 35 minutes.

The flight tracks northeast over the Maryland piedmont, then crosses into Pennsylvania briefly before entering New York state. The Adirondack Mountains are visible to the left (northwest) during the mid-cruise phase — a broad, dark forested highland. Lake Champlain, running north-south along the Vermont-New York border, is a long narrow body of water visible below or to the left as the aircraft approaches the Canadian border. The Green Mountains of Vermont appear to the right in the middle distance. The terrain flattens noticeably as the flight crosses into Quebec's St. Lawrence lowlands on descent.