Janesville to O'Fallon, Illinois: Road Trip Guide & Distance

How far is Janesville from O'Fallon, Illinois?

The distance from Janesville to O'Fallon, Illinois is 286.5 miles (461 km) as the crow flies. O'Fallon, Illinois is located S of Janesville. By car, the driving distance is approximately 358.1 miles, taking about 7h 12min. A direct flight would take roughly 1h 5min. Both are located in United States — Janesville in Wisconsin and O'Fallon, Illinois in Illinois.

For a drive of this length, it's recommended to plan at least one quick rest stop to stretch your legs and grab a coffee.

Coordinates come from public place data for Janesville and O'Fallon, Illinois. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.