Sit on the Left side of the plane for the best views on flights from Washington to Calgary. Left side wins at both ends of the flight. The Rockies approach into Calgary on the left is one of the most visually striking arrivals in North America, and the Potomac corridor departure from Dulles also favors left. During the cruise over Montana and southern Alberta, the left side also picks up distant views of the northern Rockies and Glacier National Park terrain.

During takeoff from Washington Dulles International (IAD), sit on the Left side for the best views. Dulles typically departs westbound on runway 19L/R or 01L/R. Climbing out heading northwest toward YYC, the left side faces south and east, giving views over the Virginia suburbs and the Potomac River corridor. The right side faces north toward the Maryland countryside, but the left captures the broader DC metro sprawl and the Potomac snaking southeast toward the capital. Notable sights include: Potomac River corridor, Tysons Corner urban cluster, Dulles Access Road corridor, Virginia Blue Ridge foothills to the southwest.

When landing at Calgary International (YYC), sit on the Left side for the best views. YYC typically lands on runways 35L/R (northbound) or 17L/R (southbound). Approaching from the southeast on a northbound landing, the left side faces west and gives a direct broadside view of the entire Front Range of the Canadian Rockies — a wall of peaks running north-south along the horizon. The right side faces east over the flat Alberta prairie with little of visual interest. Notable sights include: Canadian Rockies Front Range, Mount Yamnuska, Bow River valley, Calgary downtown skyline.

The flight from Washington Dulles International (IAD) to Calgary International (YYC) takes Approximately 4 hours 15 minutes to 4 hours 45 minutes.

The flight tracks northwest over Pennsylvania and upstate New York or southern Ontario, then across Lake Erie or Lake Ontario depending on routing, over southern Michigan or Ontario, across Wisconsin or Minnesota, then over the Dakotas and into Montana. Notable features include the Great Lakes shoreline, the flat agricultural grid of the northern Great Plains, the Missouri River breaks in Montana, and the increasingly rugged terrain of the Rocky Mountain foothills as you approach Alberta.