Miles between Thornton, CO and Flagstaff, AZ

There are
684 mi
from Thornton, CO to Flagstaff, AZ

That's the driving distance. It would take 13 hours 9 mins to go from Thornton, Colorado to Flagstaff, Arizona.

The flight distance (direct flight from Thornton, CO to Flagstaff, AZ) is 486.96 mi.

684 mi = 1,101.06 kms