There are
2,159 mi
from Walnut Creek, CA to Herrin, IL
That's the driving distance. It would take 1 day 13 hours to go from Walnut Creek, California to Herrin, Illinois.
The flight distance (direct flight from Walnut Creek, CA to Herrin, IL) is 1,792.75 mi.
2,159 mi = 3,474.69 kms