Seattle to London flight path: SEA to LHR

Sit on the Right side of the plane for the best views on flights from Seattle to London. The right side delivers the two strongest visual moments of the flight: Mount Rainier and the Cascades during climb-out, and Windsor Castle with the Thames during the Heathrow approach. The left side offers decent views of Puget Sound and, mid-flight, a chance at Greenland's icecap, but lacks the same landmark density at both ends of the journey.

During takeoff from Seattle Tacoma International (SEA), sit on the Right side for the best views. SEA departures generally climb north over Puget Sound before banking east toward the Cascade corridor and Canada. That turn puts the Cascade Range and Mount Rainier's glaciated summit on the right side, with Lake Washington and the Sammamish plateau receding below. Notable sights include: Mount Rainier, Cascade Range foothills, Lake Washington, Mount Baker (distant north).

When landing at Heathrow (LHR), sit on the Right side for the best views. On Heathrow's typical westerly approach, aircraft descend over Surrey and Berkshire before crossing almost directly over Windsor Castle just before touchdown on 27L/27R. The right side faces north toward the Thames valley and the distant London skyline during this final stretch. Notable sights include: Windsor Castle, River Thames, distant London skyline (The Shard, Canary Wharf), Home Counties farmland.

The flight from Seattle Tacoma International (SEA) to Heathrow (LHR) takes about 9 hours 10 minutes. The shortest flight path between them is 4,786 miles (7,702 km); winds and air traffic control usually add a few percent.

The route crosses the Canadian Rockies' northern foothills near Alberta, then the tundra and lake-dotted terrain around Hudson Bay and Labrador, before passing near the southern tip of Greenland's ice sheet and fjords, then continuing over the North Atlantic past Iceland toward Ireland and southern England.