There are
2,104 mi
from Pendleton, OR to Clarksville, IN
That's the driving distance. It would take 1 day 12 hours to go from Pendleton, Oregon to Clarksville, Indiana.
The flight distance (direct flight from Pendleton, OR to Clarksville, IN) is 1,757.12 mi.
2,104 mi = 3,385.58 kms