Miles between Thornton, CO and Marietta, OH

There are
1,386 mi
from Thornton, CO to Marietta, OH

That's the driving distance. It would take 1 day 1 hour to go from Thornton, Colorado to Marietta, Ohio.

The flight distance (direct flight from Thornton, CO to Marietta, OH) is 1,248.01 mi.

1,386 mi = 1.61 kms