Nonstop from Seattle-Tacoma International to London Heathrow: distance, flying time, which airlines fly it and how often.
Distance
4,786 mi, great circle
Flying time
typical, gate to gate
Flights a day
average, November 2026
Airlines
passenger airlines
The shortest path over the Earth's surface. Actual tracks vary with winds and airspace. Map © OpenStreetMap contributors.
Fares found in recent searches load here. You can also compare SEA to LHR fares by month.
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Heathrow connection times by terminal: the official 60- and 90-minute minimums, realistic buffers, and when an hour at LHR is not enough.
Transit visa rules by hub, 2026: which airports let you connect airside without a visa, and why the US and Mexico have no sterile transit.
About 9h 50m gate to gate for the 7,702 km (4,786 mile) trip, estimated from distance. Schedules vary by airline and season, and winds can add or save time.
Alaska Airlines, British Airways and Delta Air Lines, with about 3.7 flights a day between them in our data (AeroDataBox, November 2026).