There are 473.64 miles from Portland to Washington Dulles International Airport (IAD) in southeast direction and 606 miles (975.26 kilometers) by car, following the I-76 E and PATP route.
Portland and IAD Airport are 9 hours 23 mins far apart, if you drive non-stop.
This is the fastest route from Portland, MI to IAD Airport. The halfway point is Windham, OH.
Portland, MI and IAD Airport are in the same time zone (EDT). Current time in both locations is 10:03 am.
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