Sit on the Left side of the plane for the best views on flights from Taipei to Seattle. The left side wins overall due to the spectacular Seattle approach over Puget Sound with the city skyline and Olympic Mountains. During the transpacific cruise, neither side offers dramatically different views over open ocean, but the left side also catches the southern Alaskan coastline and occasional glimpses of the Gulf of Alaska on the great circle route.

During takeoff from Sungshan (TSA), sit on the Right side for the best views. Songshan Airport's primary departure runway is 10/28. Departing eastward on Runway 10, a right-side seat gives you views over central Taipei's dense urban grid and the Keelung River before climbing northeast over the northern coast. Departing westward on Runway 28, the right side still captures the Taipei Basin and Yangmingshan volcanic range to the north. Notable sights include: Taipei 101 skyscraper to the south, Yangmingshan National Park volcanic hills to the north, Keelung River winding through the city, Taipei Basin urban sprawl.

When landing at Seattle Tacoma International (SEA), sit on the Left side for the best views. SeaTac primarily uses runways 16L/16R for southward landings, with the approach coming in from the north over Puget Sound. A left-side seat on final approach gives you a clear view of Elliott Bay, downtown Seattle's skyline, and the Olympic Mountains across the water to the west. Right side faces east toward the Cascade Range and Mount Rainier. Notable sights include: Mount Rainier to the southeast, Elliott Bay and downtown Seattle skyline, Puget Sound, Olympic Mountains on the western horizon.

The flight from Sungshan (TSA) to Seattle Tacoma International (SEA) takes Approximately 10 to 11 hours.

The great circle route arcs northeast over the East China Sea, crosses southern Japan near Hokkaido or the Tohoku coast, then tracks across the North Pacific. The route passes south of the Aleutian Islands chain and crosses the Gulf of Alaska before descending over the British Columbia coast and the Cascade Range into Seattle. Open ocean dominates the middle 7 hours with occasional cloud breaks revealing the deep North Pacific.