Miles between Boulder, CO and Seatac, WA

There are
1,301 mi
from Boulder, CO to Seatac, WA

That's the driving distance. It would take 22 hours 41 mins to go from Boulder, Colorado to Seatac, Washington.

The flight distance (direct flight from Boulder, CO to Seatac, WA) is 991.16 mi.

1,301 mi = 1.61 kms