Sit on the Left side of the plane for the best views on flights from Seattle to Seoul. Left side wins both ends of the flight. At takeoff you get Mount Rainier and the Seattle skyline; on arrival you get the Han River estuary and Seoul spread out below. The right side offers Puget Sound at departure and open Yellow Sea on approach — both less visually compelling.

During takeoff from Seattle Tacoma International (SEA), sit on the Left side for the best views. SEA primarily uses runways 16L/16R for southbound departures or 34L/34R for northbound. On a northbound departure toward Asia, aircraft typically turn northwest then north, putting the left side facing east toward the Cascades and Mount Rainier. The left side gets a clear view of Rainier dominating the skyline to the southeast, with the Seattle skyline and Elliott Bay visible during the initial climb. Notable sights include: Mount Rainier (14,411 ft, southeast), Seattle downtown skyline and Elliott Bay (northwest), Lake Washington (east), Puget Sound (west).

When landing at Incheon International (ICN), sit on the Left side for the best views. Incheon Airport sits on Yeongjong Island west of Seoul. Aircraft typically approach from the west or northwest on runway 15L/15R or 33L/33R. On a transpacific arrival from the northeast, the approach over the Yellow Sea puts the left side facing south toward the Korean mainland, offering views of the Han River estuary, the Seoul metropolitan sprawl, and the mountainous terrain surrounding the city. Notable sights include: Han River estuary and tidal flats (south), Seoul metropolitan area skyline (southeast), Gyeonggi Bay and Yellow Sea islands (west), Bukhansan mountain ridgeline north of Seoul (east).

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

The great circle route from SEA to ICN arcs north over British Columbia and the Alaska panhandle, crosses the Aleutian Island chain (visible as a string of volcanic islands in the North Pacific), then tracks southwest over the Kamchatka Peninsula and the Sea of Japan. Passengers may see the snow-covered Aleutian volcanoes, sea ice in the Bering Sea region depending on season, and the rugged coastline of Kamchatka before descending toward the Korean Peninsula.