"See actual flight paths with flightpaths.com"
Weather, politics and local regulations can affect the choice of airspace and flight corridors. Flightpaths.com lets you see the real flight paths and compare passenger airlines and flight times simplified on an interactive map.
Flights from Seattle (SEA), USA to London (LHR), United Kingdom illustrated on a map. Based on 105 recorded flights, the distance can vary between 4865 and 5277 miles.