Sit on the Left side of the plane for the best views on flights from Houston to Seattle. Left side wins at both ends of the flight. During the cruise over the Pacific Northwest interior, the left side also tracks closer to the Cascade Range as the route curves northwest, offering periodic views of volcanic peaks including Mount Shasta and the Oregon Cascades on clear days. Right side has a strong case for Mount Rainier on approach, but left delivers more consistently across the full flight.

During takeoff from George Bush Intcntl Houston (IAH), sit on the Left side for the best views. IAH primarily departs northbound or southbound on runways 8L/26R and 15/33. On a northwest-bound departure toward Seattle, aircraft typically turn left (west then northwest), putting the left side over downtown Houston, the Ship Channel, and the sprawling Houston metro grid. The right side faces open suburban sprawl with less visual interest. Notable sights include: Downtown Houston skyline, Houston Ship Channel and Buffalo Bayou, Lake Houston to the northeast, Galveston Bay visible to the south on clear days.

When landing at Seattle Tacoma International (SEA), sit on the Left side for the best views. SEA-TAC primarily lands from the south on runways 16L/16R, meaning aircraft approach from the south heading north. The left (west) side gives views over Puget Sound, Vashon Island, and the Olympic Peninsula beyond. The right side faces east toward the Cascades and Mount Rainier, which is spectacular — but the left side offers the broader panorama of Puget Sound's island-studded water with the Olympics as a backdrop, making it the more consistently rewarding seat across the full approach. Notable sights include: Puget Sound and Vashon Island, Olympic Peninsula and Olympic Mountains, Tacoma and Commencement Bay, Elliott Bay and downtown Seattle skyline.

The flight from George Bush Intcntl Houston (IAH) to Seattle Tacoma International (SEA) takes Approximately 4 hours 15 minutes to 4 hours 45 minutes.

The route tracks northwest over central Texas, crosses the Red River into Oklahoma, then over the Texas Panhandle or southern Colorado depending on routing. It crosses the Rockies over southern Wyoming or northern Utah, then traverses the Snake River Plain of southern Idaho before crossing the Columbia Plateau and entering Washington state. On clear days, the volcanic Cascade peaks including Mount Adams and Mount St. Helens become visible on descent into Seattle.