Miles between Ontario, CA and Markham, IL

There are
1,977 mi
from Ontario, CA to Markham, IL

That's the driving distance. It would take 1 day 10 hours to go from Ontario, California to Markham, Illinois.

The flight distance (direct flight from Ontario, CA to Markham, IL) is 1,705.66 mi.

1,977 mi = 1.61 kms