"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 Sacramento (SMF), USA to Chicago (MDW), USA illustrated on a map. Based on 6 recorded flights, the distance can vary between 1831 and 1860 miles.
Over water
Over water