Miles between Thornton, CO and Arnold, MO

There are
855 mi
from Thornton, CO to Arnold, MO

That's the driving distance. It would take 15 hours 7 mins to go from Thornton, Colorado to Arnold, Missouri.

The flight distance (direct flight from Thornton, CO to Arnold, MO) is 787.35 mi.

855 mi = 1,376.77 kms