There are
1,905 mi
from San Mateo, CA to Ottumwa, IA
That's the driving distance. It would take 1 day 8 hours to go from San Mateo, California to Ottumwa, Iowa.
The flight distance (direct flight from San Mateo, CA to Ottumwa, IA) is 1,609.51 mi.
1,905 mi = 1.61 kms