Miles between Ontario, CA and Billings, MT

There are
1,203 mi
from Ontario, CA to Billings, MT

That's the driving distance. It would take 21 hours 10 mins to go from Ontario, California to Billings, Montana.

The flight distance (direct flight from Ontario, CA to Billings, MT) is 942.36 mi.

1,203 mi = 1.61 kms