There are 348.79 miles from Green Valley to Johnston in southwest direction and 457 miles (735.47 kilometers) by car, following the I-80 route.
Green Valley and Johnston are 7 hours 27 mins far apart, if you drive non-stop .
This is the fastest route from Green Valley, WI to Johnston, IA. The halfway point is Platteville, WI.
Green Valley, WI and Johnston, IA are in the same time zone (CDT). Current time in both locations is 9:15 pm.
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