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How far is London from Seattle, WA?

The distance between Seattle (Seattle–Tacoma International Airport) and London (London Heathrow Airport) is 4800 miles / 7725 kilometers / 4171 nautical miles. The estimated flight time is 9 hours and 35 minutes.

Seattle–Tacoma International Airport – London Heathrow Airport

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4800
Miles
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7725
Kilometers
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4171
Nautical miles

Distance from Seattle to London

There are several ways to calculate the distance from Seattle to London. Here are two standard 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 planet.

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).

How long does it take to fly from Seattle to London?

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

What is the time difference between Seattle and London?

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

Flight carbon footprint between Seattle–Tacoma International Airport (SEA) and London Heathrow Airport (LHR)

On average, flying from Seattle to London generates about 558 kg of CO2 per passenger, and 558 kilograms equals 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