How far is London from Seattle?
There are several ways to calculate distances between Seattle and London. 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 Seattle–Tacoma International Airport (SEA) to London Heathrow Airport (LHR) is 9 hours 35 minutes.
Time difference and current local times
The time difference between Seattle and London is 8 hours. London is 8 hours ahead of Seattle.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 565 kg (1 246 pounds).
Seattle to London flight path
Shortest flight path between Seattle–Tacoma International Airport (SEA) and London Heathrow Airport (LHR).
Frequent Flyer Miles Calculator
Seattle (SEA) → London (LHR).