There are
358 mi
from Clarksville, TN to Piqua, OH
That's the driving distance. It would take 7 hours 3 mins to go from Clarksville, Tennessee to Piqua, Ohio.
The flight distance (direct flight from Clarksville, TN to Piqua, OH) is 301.49 mi.
358 mi = 576.59 kms