There are
921 mi
from Conroe, TX to Ottumwa, IA
That's the driving distance. It would take 17 hours 15 mins to go from Conroe, Texas to Ottumwa, Iowa.
The flight distance (direct flight from Conroe, TX to Ottumwa, IA) is 758.97 mi.
921 mi = 1,482.25 kms