There are
2,037 mi
from Petaluma, CA to Ballwin, MO
That's the driving distance. It would take 1 day 11 hours to go from Petaluma, California to Ballwin, Missouri.
The flight distance (direct flight from Petaluma, CA to Ballwin, MO) is 1,728.57 mi.
2,037 mi = 3,278.32 kms