There are
2,106 mi
from Walnut Creek, CA to Addison, IL
That's the driving distance. It would take 1 day 12 hours to go from Walnut Creek, California to Addison, Illinois.
The flight distance (direct flight from Walnut Creek, CA to Addison, IL) is 1,814.84 mi.
2,106 mi = 3,388.72 kms