There are 181.19 miles from Castine to South Boston in southwest direction and 265 miles (426.48 kilometers) by car, following the I-95 S route.
Castine and South Boston are 4 hours 35 mins far apart, if you drive non-stop .
This is the fastest route from Castine, ME to South Boston, MA. The halfway point is Bowdoinham, ME.
Castine, ME and South Boston, MA are in the same time zone (EDT). Current time in both locations is 2:03 am.
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