There are 156.90 miles from Chicago to Decatur in southwest direction and 183 miles (294.51 kilometers) by car, following the I-55 S route.
Chicago and Decatur are 3 hours 5 mins far apart, if you drive non-stop.
This is the fastest route from Chicago, IL to Decatur, IL. The halfway point is Buckley, IL.
Chicago, IL and Decatur, IL are in the same time zone (CDT). Current time in both locations is 2:15 pm.
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