Miles between Fort Smith, AR and Thornton, CO

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

That's the driving distance. It would take 13 hours 58 mins to go from Fort Smith, Arkansas to Thornton, Colorado.

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

812 mi = 1,307.11 kms