Miles between Thornton, CO and Portland, TN

There are
1,155 mi
from Thornton, CO to Portland, TN

That's the driving distance. It would take 20 hours 47 mins to go from Thornton, Colorado to Portland, Tennessee.

The flight distance (direct flight from Thornton, CO to Portland, TN) is 1,025.15 mi.

1,155 mi = 1.61 kms