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

How far is Killeen from O'Fallon, Illinois?

The distance from Killeen to O'Fallon, Illinois is 680 miles (1094.3 km) as the crow flies. O'Fallon, Illinois is located NE of Killeen. By car, the driving distance is approximately 816 miles, taking about 16h 25min. A direct flight would take roughly 1h 52min. Both are located in United States — Killeen in Texas and O'Fallon, Illinois in Illinois.

This is a serious multi-day road trip! We strongly recommend breaking this journey up with an overnight stay to ensure you arrive safely and refreshed. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility. For a trip of this distance, flying is significantly faster. However, driving offers the flexibility to explore stops along the way.

Coordinates come from public place data for Killeen 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.