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Distance between Seattle, WA (SEA) and London (LHR)

Flight distance from Seattle to London (Seattle–Tacoma International Airport – London Heathrow Airport) is 4800 miles / 7725 kilometers / 4171 nautical miles. Estimated flight time is 9 hours 35 minutes.

Seattle – London

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4800
Miles
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7725
Kilometers
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4171
Nautical miles

How far is London from Seattle?

There are several ways to calculate distances between Los Angeles and Chicago. 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).

Flight Duration

Estimated flight time from Seattle–Tacoma International Airport to London Heathrow Airport is 9 hours 35 minutes.

Time difference

The time difference between Seattle and London is 8 hours. London is 8 hours ahead of Seattle.
Seattle time to London time converter

Carbon dioxide emissions

On average flying from Seattle to London generates about 558 kg of CO2 per passenger, 558 kilograms is equal to 1 230 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Seattle to London

Shortest flight path between Seattle–Tacoma International Airport (SEA) and London Heathrow Airport (LHR).

Airport information

Origin Seattle–Tacoma International Airport
City: Seattle, WA
Country: United States Flag of United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″W
Destination London Heathrow Airport
City: London
Country: United Kingdom Flag of United Kingdom
IATA Code: LHR
ICAO Code: EGLL
Coordinates: 51°28′14″N, 0°27′42″W