Alton, Illinois to Saint Peters, Missouri: Road Trip Guide & Distance

How far is Alton, Illinois from Saint Peters, Missouri?

The distance from Alton, Illinois to Saint Peters, Missouri is 24.6 miles (39.6 km) as the crow flies. Saint Peters, Missouri is located WSW of Alton, Illinois. By car, the driving distance is approximately 32 miles, taking about 39min. A direct flight would take roughly 33min. Both are located in United States — Alton, Illinois in Illinois and Saint Peters, Missouri in Missouri.

This is a very short trip, perfect for a quick morning drive or an easy commute. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare. Given the short distance, driving or taking a train is often faster and more convenient than dealing with airport security and flight boarding times.

Coordinates come from public place data for Alton, Illinois 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.