Miles between Ontario, OR and Ballwin, MO

There are
1,660 mi
from Ontario, OR to Ballwin, MO

That's the driving distance. It would take 1 day 4 hours to go from Ontario, Oregon to Ballwin, Missouri.

The flight distance (direct flight from Ontario, OR to Ballwin, MO) is 1,414.62 mi.

1,660 mi = 2,672.24 kms