There are
1,952 mi
from Ontario, CA to Madisonville, KY
That's the driving distance. It would take 1 day 10 hours to go from Ontario, California to Madisonville, Kentucky.
The flight distance (direct flight from Ontario, CA to Madisonville, KY) is 1,699.60 mi.
1,952 mi = 3,142.06 kms