How far is Seattle from London?
There are several ways to calculate distances between London and Seattle. Here are two common methods:Vincenty's formula (applied above)
- 4800.220 miles
- 7725.205 kilometers
- 4171.277 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.Haversine formula
- 4785.859 miles
- 7702.094 kilometers
- 4158.798 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).
Estimated flight time from Heathrow Airport (LHR) to Seattle–Tacoma International Airport (SEA) is 9 hours 35 minutes.
Time difference and current local times
The time difference between London and Seattle is 8 hours. Seattle is 8 hours behind London.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 565 kg (1 246 pounds).
London to Seattle flight map.
Frequent Flyer Miles Calculator
London (LHR) → Seattle (SEA).