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

How far is Fort Collins from O'Fallon, Missouri?

The distance from Fort Collins to O'Fallon, Missouri is 773.6 miles (1245 km) as the crow flies. O'Fallon, Missouri is located E of Fort Collins. By car, the driving distance is approximately 928.3 miles, taking about 18h 41min. A direct flight would take roughly 2h 3min. Both are located in United States — Fort Collins in Colorado and O'Fallon, Missouri in Missouri.

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 Fort Collins 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.