There are
1,670 mi
from Pendleton, OR to Ottumwa, IA
That's the driving distance. It would take 1 day 4 hours to go from Pendleton, Oregon to Ottumwa, Iowa.
The flight distance (direct flight from Pendleton, OR to Ottumwa, IA) is 1,357.33 mi.
1,670 mi = 2,687.03 kms