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

How far is Marion, Indiana from O'Fallon, Illinois?

The distance from Marion, Indiana to O'Fallon, Illinois is 264 miles (424.9 km) as the crow flies. O'Fallon, Illinois is located WSW of Marion, Indiana. By car, the driving distance is approximately 330 miles, taking about 6h 38min. A direct flight would take roughly 1h 2min. Both are located in United States — Marion, Indiana in Indiana 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. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare.

Coordinates come from public place data for Marion, Indiana 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.