O'Fallon, Missouri to Waterloo, Iowa: Road Trip Guide & Distance

How far is O'Fallon, Missouri from Waterloo, Iowa?

The distance from O'Fallon, Missouri to Waterloo, Iowa is 268.6 miles (432.2 km) as the crow flies. Waterloo, Iowa is located NNW of O'Fallon, Missouri. By car, the driving distance is approximately 335.7 miles, taking about 6h 45min. A direct flight would take roughly 1h 2min. Both are located in United States — O'Fallon, Missouri in Missouri and Waterloo, Iowa in Iowa.

For a drive of this length, it's recommended to plan at least one quick rest stop to stretch your legs and grab a coffee. 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.

Coordinates come from public place data for O'Fallon, Missouri and Waterloo, Iowa. 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.