Miles between Thornton, CO and Portland, OR

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

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

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

1,233 mi = 1.61 kms