Casa Grande to Ontario: Road Trip Guide & Distance

How far is Casa Grande from Ontario?

The distance from Casa Grande to Ontario is 349.3 miles (562.2 km) as the crow flies. Ontario is located WNW of Casa Grande. By car, the driving distance is approximately 419.2 miles, taking about 8h 26min. A direct flight would take roughly 1h 12min. Both are located in United States — Casa Grande in Arizona and Ontario in California.

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. 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 Casa Grande and Ontario. 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.