"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 Madrid (MAD), Spain to Chicago (ORD), USA illustrated on a map. Based on 6 recorded flights, the distance can vary between 4255 and 4320 miles.
Canada
Spain
Over water
Canada
Spain
Over water
Portugal
You can also check the reverse route: Chicago to Madrid