There are 121.69 miles from South Portland to Alton in northeast direction and 150 miles (241.40 kilometers) by car, following the I-95 N route.
South Portland and Alton are 2 hours 21 mins far apart, if you drive non-stop .
This is the fastest route from South Portland, ME to Alton, ME. The halfway point is Fairfield, ME.
South Portland, ME and Alton, ME are in the same time zone (EDT). Current time in both locations is 10:19 pm.
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