✈ SEA → LHR
9H 55M FROM SEATTLE TO LONDON. JET LAG IS NOW YOUR PERSONALITY.
Flight from Seattle to London
From Sea-Tac (SEA), USA North America → Heathrow (LHR), United Kingdom Europe
↔ Flying the other way? London → Seattle
How long is the flight from Seattle to London?
A nonstop flight from Seattle (SEA) to London (LHR) takes about 9 hours 55 minutes, covering a great-circle distance of 4,786 miles (7,702 km). Actual scheduled time varies by airline, routing, and wind — expect ±15 to 30 minutes from this estimate.
Avg flight time
9h 55m
Nonstop, scheduled
Distance
4,786 mi
7,702 km · great-circle
Avg speed
776 km/h
Door-to-door including taxi
Time zones & jet lag
Seattle timezone
UTC-7
America/Los_Angeles
London timezone
UTC+1
Europe/London
Time difference
+8h
8 hours ahead
Jet lag (rough)
~8d
Eastward — worse
CO₂ footprint per passenger
Economy class, single passenger. Source: DEFRA 2024 averages.
This flight emits roughly 3.6× the CO₂ of an equivalent train trip and 0.9× a car driven alone over the same distance.
Flights from Seattle
Nearest destinations
- Seattle → Vancouver
- Seattle → San Francisco
- Seattle → Las Vegas
- Seattle → Los Angeles
- Seattle → Dallas
- Seattle → Chicago
- Seattle → Toronto
- Seattle → Atlanta
- Seattle → Mexico City
- Seattle → New York
Long-haul from Seattle
- Seattle → Johannesburg
- Seattle → Cape Town
- Seattle → Nairobi
- Seattle → Melbourne
- Seattle → Bali (Denpasar)
- Seattle → Kuala Lumpur
- Seattle → Singapore
- Seattle → Sydney
- Seattle → Mumbai
- Seattle → Abu Dhabi
More flights to Europe
Flights to London
Nearest origins
- Manchester → London
- Paris → London
- Brussels → London
- Amsterdam → London
- Dublin → London
- Edinburgh → London
- Frankfurt → London
- Zurich → London
- Milan → London
- Munich → London
Long-haul to London
- Auckland → London
- Sydney → London
- Melbourne → London
- Bali (Denpasar) → London
- Santiago → London
- Buenos Aires → London
- Singapore → London
- Manila → London
- Kuala Lumpur → London
- Taipei → London