There are
2,112 mi
from Walnut Creek, CA to Markham, IL
That's the driving distance. It would take 1 day 12 hours to go from Walnut Creek, California to Markham, Illinois.
The flight distance (direct flight from Walnut Creek, CA to Markham, IL) is 1,831.23 mi.
2,112 mi = 3,399.01 kms