Great-circle route LHR → SEA. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
The flight time from London to Seattle is approximately 9h 44m nonstop. The distance is 4,786 miles (7,702 km). There are about 5 nonstop flights from London to Seattle per day.
That is a great-circle estimate, not a scheduled block time. An airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
| Route | Est. time | Distance | Frequency | Airlines |
|---|---|---|---|---|
| LHR → SEA London Heathrow Airport to Seattle Tacoma International Airport |
9h 44m | 4,786 mi | 35/wk | Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic Airways |
Frequencies come from our most recent schedule sample. Where a pairing shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
4 airlines fly nonstop from London to Seattle, including Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic Airways.
Recent scheduled departures on this route have used the Boeing 787-10, Airbus A330-900, Boeing 777-300ER Passenger, Boeing 787-9 and 3 other types.
Aircraft assignments change by season and by time of day.
On a long east–west route like this one the two directions do not take the same time. Aircraft flying eastbound ride the mid-latitude jet stream and typically arrive earlier than the westbound leg, which flies into it. The difference is commonly 30 to 90 minutes on transatlantic and transpacific flights, and it varies by season. The estimate above does not model wind — treat it as a midpoint and check the airline's own timetable for the block time on your date.
The distance from London to Seattle is 4,786 miles, or 7,702 kilometres.
| Great-circle distance | 4,786 mi |
| Kilometres | 7,702 km |
| Nautical miles | 4,159 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. 4 airlines fly it nonstop, with about 35 departures a week. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 9h 44m in the air on the LHR–SEA nonstop. That is a great-circle estimate from the 4,786-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
4,786 miles (7,702 km) great-circle between London Heathrow Airport and Seattle Tacoma International Airport.
Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic Airways.
Recent scheduled departures have used the Boeing 787-10, Airbus A330-900, Boeing 777-300ER Passenger, Boeing 787-9. Assignments change by season and by time of day.
