Miles between Ontario, CA and Ballwin, MO

There are
1,771 mi
from Ontario, CA to Ballwin, MO

That's the driving distance. It would take 1 day 6 hours to go from Ontario, California to Ballwin, Missouri.

The flight distance (direct flight from Ontario, CA to Ballwin, MO) is 1,534.98 mi.

1,771 mi = 2,850.75 kms