Calculations with different methods
- 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).
Estimated flight time from Seattle–Tacoma International Airport (SEA) to 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 594 kg (1 309 pounds).
Seattle to London flight map.
Frequent Flyer Miles Calculator
Seattle (SEA) → London (LHR).