Marion, Iowa to O'Fallon, Missouri: Road Trip Guide & Distance

How far is Marion, Iowa from O'Fallon, Missouri?

The distance from Marion, Iowa to O'Fallon, Missouri is 227.7 miles (366.4 km) as the crow flies. O'Fallon, Missouri is located SSE of Marion, Iowa. By car, the driving distance is approximately 284.6 miles, taking about 5h 44min. A direct flight would take roughly 57min. Both are located in United States — Marion, Iowa in Iowa and O'Fallon, Missouri in Missouri.

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. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility.

Coordinates come from public place data for Marion, Iowa and O'Fallon, Missouri. 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.