There are
656 mi
from Lawton, OK to Ottumwa, IA
That's the driving distance. It would take 11 hours 58 mins to go from Lawton, Oklahoma to Ottumwa, Iowa.
The flight distance (direct flight from Lawton, OK to Ottumwa, IA) is 550.25 mi.
656 mi = 1,055.04 kms