There are
1,866 mi
from Gresham, OR to Ottumwa, IA
That's the driving distance. It would take 1 day 7 hours to go from Gresham, Oregon to Ottumwa, Iowa.
The flight distance (direct flight from Gresham, OR to Ottumwa, IA) is 1,532.66 mi.
1,866 mi = 1.61 kms