"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 Boston (BOS), USA to Porto (OPO), Portugal illustrated on a map. Based on 6 recorded flights, the distance can vary between 3181 and 3222 miles.
Portugal
Over water
Portugal
Over water
Canada