Flagstaff to Ontario: Road Trip Guide & Distance

How far is Flagstaff from Ontario?

The distance from Flagstaff to Ontario is 350 miles (563.2 km) as the crow flies. Ontario is located W of Flagstaff. By car, the driving distance is approximately 419.9 miles, taking about 8h 27min. A direct flight would take roughly 1h 12min. Both are located in United States — Flagstaff 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 Flagstaff 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.