Miles between Ontario, CA and St Helens, OR

There are
1,023 mi
from Ontario, CA to St Helens, OR

That's the driving distance. It would take 19 hours 32 mins to go from Ontario, California to St Helens, Oregon.

The flight distance (direct flight from Ontario, CA to St Helens, OR) is 859.23 mi.

1,023 mi = 1.61 kms