Miles between Thornton, CO and Fort Smith, AR

There are
812 mi
from Thornton, CO to Fort Smith, AR

That's the driving distance. It would take 13 hours 57 mins to go from Thornton, Colorado to Fort Smith, Arkansas.

The flight distance (direct flight from Thornton, CO to Fort Smith, AR) is 655.63 mi.

812 mi = 1,307.41 kms