Allen to O'Fallon, Missouri: Road Trip Guide & Distance
How far is Allen from O'Fallon, Missouri?
The distance from Allen to O'Fallon, Missouri is 516.5 miles (831.2 km) as the crow flies. O'Fallon, Missouri is located NE of Allen. By car, the driving distance is approximately 619.8 miles, taking about 12h 28min. A direct flight would take roughly 1h 32min. Both are located in United States — Allen in Texas 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.
Coordinates come from public place data for Allen 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.
How to Get from Allen to O'Fallon, Missouri
Suggested Stops Between Allen & O'Fallon, Missouri
- 1249 mi
- 2204 mi
- 3266 mi
- 475 mi
- 5209 mi
Quick Facts
Did You Know?
- At walking speed (3 mph), it would take about 172 hours of non-stop walking
- By bicycle at 12 mph, the journey would take roughly 43 hours
- You could travel this distance about 48.2 times to circle the Earth's equator