How is the flight distance measured?

Flight distances are measured as the great-circle (straight-line) distance between airports. Actual flight paths may be slightly longer due to air traffic routing and weather avoidance.

How long does the flight from London to Seattle take?

Flight time depends on the exact route and aircraft, but at roughly 7,701 km the typical non-stop flight takes 1–10 hours. Check the flight duration page for the exact average.

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Flight Distance: London to Seattle

7,701

Kilometres (km)

4,785

Miles (mi)

4,158

Nautical miles

About this flight distance

The great circle distance from London to Seattle is approximately 7,701 km. The typical flight time is 9h 33m.

This is the shortest possible distance between the two cities as the crow flies. Real flight paths are often slightly longer due to air traffic control routing, weather, and airspace restrictions.

Related route pages

→Direct flights London to Seattle →Flight duration London to Seattle →Cheapest day to fly London to Seattle →Flights London to Seattle

Nearby airports

Near London

London City Airport (LCY)36 km
London Gatwick Airport (LGW)41 km
London Luton Airport (LTN)45 km

Near Seattle

Boeing Field King County International Airport (BFI)9 km
Tacoma Narrows Airport (TIW)29 km
Snohomish County (Paine Field) Airport (PAE)51 km

Frequently Asked Questions

The great-circle distance from London to Seattle is approximately 7,701 km (4,785 miles).