There are 683.64 miles from Alton to Washington Dulles International Airport (IAD) in east direction and 830 miles (1,335.76 kilometers) by car, following the I-70 route.
Alton and IAD Airport are 12 hours 43 mins far apart, if you drive non-stop .
This is the fastest route from Alton, IL to IAD Airport. The halfway point is Summerford, OH.
Please note the time difference between Alton, IL and IAD Airport is 1 hour. The current time in Alton is 3:48 pm and the current time in IAD Airport is 4:48 pm.
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