Miles between Thornton, CO and Maple Valley, WA

There are
1,284 mi
from Thornton, CO to Maple Valley, WA

That's the driving distance. It would take 22 hours 18 mins to go from Thornton, Colorado to Maple Valley, Washington.

The flight distance (direct flight from Thornton, CO to Maple Valley, WA) is 995.63 mi.

1,284 mi = 1.61 kms