There are 16.46 miles from Riverside to Ontario in northwest direction and 18 miles (28.97 kilometers) by car, following the Mission Boulevard route.
Riverside and Ontario are 26 minutes far apart, if you drive non-stop.
This is the fastest route from Riverside, CA to Ontario, CA. The halfway point is Mira Loma, CA.
Riverside, CA and Ontario, CA are in the same time zone (Pacific Daylight Time). Current time in both locations is 11:42 am.
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