Boulder to St. Louis: Road Trip Guide & Distance

How far is Boulder from St. Louis?

The distance from Boulder to St. Louis is 810.3 miles (1304 km) as the crow flies. St. Louis is located E of Boulder. By car, the driving distance is approximately 972.3 miles, taking about 19h 34min. A direct flight would take roughly 2h 8min. Both are located in United States — Boulder in Colorado and St. Louis 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 Boulder and St. Louis. 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.