Flight Route · International
London → Seattle
LHR to SEA
London Heathrow Airport to Seattle–Tacoma International Airport: 4,786 miles (7,702 km), about 10h 8m airborne, −8h time-zone shift on arrival.
Distance
4,786 mi
7,702 km
Flight time
10h 8m
block time, approx
Time-zone shift
−8h
London → Los_Angeles
International?
Yes
United Kingdom → United States
LHR–SEA questions, answered
How long is the flight from London to Seattle?
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A direct flight from London Heathrow Airport (LHR) to Seattle–Tacoma International Airport (SEA) takes approximately 10h 8m. Actual block time varies with aircraft type, winds, and routing.
What is the distance from LHR to SEA?
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The great-circle distance from London Heathrow Airport to Seattle–Tacoma International Airport is approximately 4786 miles (7702 kilometers). Actual flown distance varies slightly with the routing assigned by air traffic control.
What is the time difference between London and Seattle?
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Seattle is −8h relative to London. Europe/London → America/Los_Angeles.
Which airlines fly from LHR to SEA?
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Carriers serving both endpoints include various international and regional carriers. Direct service depends on the specific carrier and season — confirm with your booking source for current schedules.
Is this an international flight?
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Yes. London Heathrow Airport is in United Kingdom, and Seattle–Tacoma International Airport is in United States. Travelers should confirm passport, visa, and customs requirements before departure.
Can I track LHR–SEA flights on TripDesk365?
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Yes. TripDesk365 imports your booking confirmations from your inbox, identifies the route, and shows real-time status — gate changes, delays, and live aircraft position. Free for 14 days.
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