Flight Route · International
Seattle → London
SEA to LHR
Seattle–Tacoma International Airport to London Heathrow 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
Los_Angeles → London
International?
Yes
United States → United Kingdom
SEA–LHR questions, answered
How long is the flight from Seattle to London?
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A direct flight from Seattle–Tacoma International Airport (SEA) to London Heathrow Airport (LHR) takes approximately 10h 8m. Actual block time varies with aircraft type, winds, and routing.
What is the distance from SEA to LHR?
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The great-circle distance from Seattle–Tacoma International Airport to London Heathrow 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 Seattle and London?
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London is +8h relative to Seattle. America/Los_Angeles → Europe/London.
Which airlines fly from SEA to LHR?
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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. Seattle–Tacoma International Airport is in United States, and London Heathrow Airport is in United Kingdom. Travelers should confirm passport, visa, and customs requirements before departure.
Can I track SEA–LHR 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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