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

How far is Gary from O'Fallon, Missouri?

The distance from Gary to O'Fallon, Missouri is 261.3 miles (420.5 km) as the crow flies. O'Fallon, Missouri is located SW of Gary. By car, the driving distance is approximately 326.6 miles, taking about 6h 34min. A direct flight would take roughly 1h 2min. Both are located in United States — Gary in Indiana 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. 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 Gary 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.