"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 San Francisco (SFO), USA to Seattle (SEA), USA illustrated on a map. Based on 16 recorded flights, the distance can vary between 694 and 729 miles.
You can also check the reverse route: Seattle to San Francisco