Miles between Thornton, CO and Marion, IN

There are
1,152 mi
from Thornton, CO to Marion, IN

That's the driving distance. It would take 20 hours 48 mins to go from Thornton, Colorado to Marion, Indiana.

The flight distance (direct flight from Thornton, CO to Marion, IN) is 1,018.08 mi.

1,152 mi = 1.61 kms