Miles between Thornton, CO and Ontario, OR

There are
860 mi
from Thornton, CO to Ontario, OR

That's the driving distance. It would take 14 hours 20 mins to go from Thornton, Colorado to Ontario, Oregon.

The flight distance (direct flight from Thornton, CO to Ontario, OR) is 679.03 mi.

860 mi = 1,383.87 kms