"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 Dulles (IAD), USA to Lisbon (LIS), Portugal illustrated on a map. Based on 22 recorded flights, the distance can vary between 3634 and 3830 miles.
Portugal
Over water
Canada
Portugal
Over water
Portugal
Over water
Canada
You can also check the reverse route: Lisbon to Dulles