Miles between Thornton, CO and Newcastle, WA

There are
1,287 mi
from Thornton, CO to Newcastle, WA

That's the driving distance. It would take 22 hours 19 mins to go from Thornton, Colorado to Newcastle, Washington.

The flight distance (direct flight from Thornton, CO to Newcastle, WA) is 1,005.43 mi.

1,287 mi = 1.61 kms