Denver to Ontario: Road Trip Guide & Distance

How far is Denver from Ontario?

The distance from Denver to Ontario is 800.8 miles (1288.8 km) as the crow flies. Ontario is located WSW of Denver. By car, the driving distance is approximately 980.8 miles, taking about 17h 7min. A direct flight would take roughly 2h 7min. Both are located in United States — Denver in Colorado and Ontario in California.

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. 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. 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 Denver and Ontario. The driving distance uses an OSRM road-route result when route data is available. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.