Miles between Portland, OR and Thornton, CO

There are
1,234 mi
from Portland, OR to Thornton, CO

That's the driving distance. It would take 21 hours 13 mins to go from Portland, Oregon to Thornton, Colorado.

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

1,234 mi = 1.61 kms