There are 229.27 miles from Seattle–Tacoma International Airport (SEA) to Diamond in east direction and 303 miles (487.63 kilometers) by car, following the I-90 E route.
SEA Airport and Diamond are 5 hours 8 mins far apart, if you drive non-stop .
This is the fastest route from SEA Airport to Diamond, WA. The halfway point is George, WA.
SEA Airport and Diamond, WA are in the same time zone (PDT). Current time in both locations is 11:52 pm.
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