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

How far is O'Fallon, Missouri from Washington, Illinois?

The distance from O'Fallon, Missouri to Washington, Illinois is 147.7 miles (237.7 km) as the crow flies. Washington, Illinois is located NNE of O'Fallon, Missouri. By car, the driving distance is approximately 184.6 miles, taking about 3h 43min. A direct flight would take roughly 48min. Both are located in United States — O'Fallon, Missouri in Missouri and Washington, 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. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility. Given the short distance, driving or taking a train is often faster and more convenient than dealing with airport security and flight boarding times.

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