There are
1,886 mi
from Boise, ID to Clarksville, IN
That's the driving distance. It would take 1 day 8 hours to go from Boise, Idaho to Clarksville, Indiana.
The flight distance (direct flight from Boise, ID to Clarksville, IN) is 1,622.46 mi.
1,886 mi = 1.61 kms