Miles between Portland, OR and Thornton, CO

There are
1,233 mi
from Portland, OR to Thornton, CO

That's the driving distance. It would take 21 hours 9 mins to go from Portland, Oregon to Thornton, Colorado.

The flight distance (direct flight from Portland, OR to Thornton, CO) is 977.57 mi.

1,233 mi = 1.61 kms