Miles between Thornton, CO and Mill Creek, WA

There are
1,307 mi
from Thornton, CO to Mill Creek, WA

That's the driving distance. It would take 22 hours 45 mins to go from Thornton, Colorado to Mill Creek, Washington.

The flight distance (direct flight from Thornton, CO to Mill Creek, WA) is 1,017.16 mi.

1,307 mi = 1.61 kms