Sit on the Left side of the plane for the best views on flights from Seattle to Frankfurt. Left side wins at both ends of the flight. During the polar routing over Canada and Greenland, the left side also tends to face south toward the Greenland ice sheet interior and Iceland if the route passes nearby, making it the stronger choice throughout the journey.

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 the common northbound departure routing toward Canada and the polar route, a left-side seat gives you Elliott Bay, downtown Seattle, and the Olympic Mountains across Puget Sound. On southbound departures, left side still captures Mount Rainier as the aircraft banks east. Notable sights include: Mount Rainier to the southeast, Elliott Bay and downtown Seattle skyline, Puget Sound and the Olympic Peninsula, Lake Washington to the east.

When landing at Frankfurt Main (FRA), sit on the Left side for the best views. Frankfurt airport sits south of the city and typically uses westward approaches on runways 25L/25C/25R. On final approach from the east, a left-side seat looks north toward the Frankfurt city center, the Main River bends, and the Rhine-Main basin. The right side faces south toward flat agricultural land with little of interest. Notable sights include: Frankfurt city skyline (Bankenviertel towers), Main River bending through the city, Rhine-Main plain, Taunus hills to the north.

The flight from Seattle Tacoma International (SEA) to Frankfurt Main (FRA) takes Approximately 9 to 10 hours.

The great circle route from SEA to FRA tracks northeast over British Columbia and Alberta, crosses Hudson Bay or Baffin Island, passes over southern Greenland's ice sheet, crosses the North Atlantic near Iceland, then enters Europe over the British Isles or Scandinavia before descending into central Germany. Key features include the Canadian Rockies early in the flight, the vast Greenland ice cap at roughly the midpoint, and the patchwork farmland of the North European Plain on descent.