There are 1,860.60 miles from Cincinnati to Ontario in west direction and 2,148 miles (3,456.87 kilometers) by car, following the I-40 and US-84 W route.
Cincinnati and Ontario are 1 day 6 hours far apart, if you drive non-stop .
This is the fastest route from Cincinnati, OH to Ontario, CA. The halfway point is Groom, TX.
Please note the time difference between Cincinnati, OH and Ontario, CA is 3 hours. The current time in Cincinnati is 9:54 am and the current time in Ontario is 6:54 am.
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