There are 330.40 miles from Portland to Altamont in southwest direction and 420 miles (675.92 kilometers) by car, following the I-69 S route.
Portland and Altamont are 6 hours 41 mins far apart, if you drive non-stop .
This is the fastest route from Portland, MI to Altamont, IL. The halfway point is Anderson, IN.
Please note the time difference between Portland, MI and Altamont, IL is 1 hour. The current time in Portland is 6:47 am and the current time in Altamont is 5:47 am.
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