Miles between Thornton, CO and Marion, IA

There are
787 mi
from Thornton, CO to Marion, IA

That's the driving distance. It would take 13 hours 55 mins to go from Thornton, Colorado to Marion, Iowa.

The flight distance (direct flight from Thornton, CO to Marion, IA) is 713.41 mi.

787 mi = 1,266.15 kms