There are 2,299.76 miles from Seattle–Tacoma International Airport (SEA) to Washington Dulles International Airport (IAD) in southeast direction and 2,802 miles (4,509.38 kilometers) by car, following the I-90 E route.
SEA Airport and IAD Airport are 1 day 16 hours far apart, if you drive non-stop .
This is the fastest route from SEA Airport to IAD Airport. The halfway point is Kennebec, SD.
Please note the time difference between SEA Airport and IAD Airport is 3 hours. The current time in SEA Airport is 9:42 pm (Mar 18) and the current time in IAD Airport is 12:42 am (Mar 19).
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