Round Rock to Saint Peters, Missouri: Road Trip Guide & Distance

How far is Round Rock from Saint Peters, Missouri?

The distance from Round Rock to Saint Peters, Missouri is 698.7 miles (1124.4 km) as the crow flies. Saint Peters, Missouri is located NNE of Round Rock. By car, the driving distance is approximately 838.4 miles, taking about 16h 52min. A direct flight would take roughly 1h 54min. Both are located in United States — Round Rock in Texas and Saint Peters, 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 Round Rock and Saint Peters, 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.