There are
2,080 mi
from Porterville, CA to Markham, IL
That's the driving distance. It would take 1 day 12 hours to go from Porterville, California to Markham, Illinois.
The flight distance (direct flight from Porterville, CA to Markham, IL) is 1,718.57 mi.
2,080 mi = 3,347.04 kms