Ontario to Saint George: Road Trip Guide & Distance

How far is Ontario from Saint George?

The distance from Ontario to Saint George is 310.4 miles (499.5 km) as the crow flies. Saint George is located NE of Ontario. By car, the driving distance is approximately 388 miles, taking about 7h 48min. A direct flight would take roughly 1h 7min. Both are located in United States — Ontario in California and Saint George in Utah.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time. 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 Ontario and Saint George. 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.