There are
1,795 mi
from The Dalles, OR to Ottumwa, IA
That's the driving distance. It would take 1 day 6 hours to go from The Dalles, Oregon to Ottumwa, Iowa.
The flight distance (direct flight from The Dalles, OR to Ottumwa, IA) is 1,472.32 mi.
1,795 mi = 2,888.01 kms