Miles between Ontario, CA and Alton, IL

There are
1,812 mi
from Ontario, CA to Alton, IL

That's the driving distance. It would take 1 day 7 hours to go from Ontario, California to Alton, Illinois.

The flight distance (direct flight from Ontario, CA to Alton, IL) is 1,555.72 mi.

1,812 mi = 1.61 kms