Miles between Thornton, CO and Happy Valley, OR

There are
1,234 mi
from Thornton, CO to Happy Valley, OR

That's the driving distance. It would take 21 hours 15 mins to go from Thornton, Colorado to Happy Valley, Oregon.

The flight distance (direct flight from Thornton, CO to Happy Valley, OR) is 969.25 mi.

1,234 mi = 1.61 kms