There are
2,112 mi
from Des Plaines, IL to Walnut Creek, CA
That's the driving distance. It would take 1 day 12 hours to go from Des Plaines, Illinois to Walnut Creek, California.
The flight distance (direct flight from Des Plaines, IL to Walnut Creek, CA) is 1,819.94 mi.
2,112 mi = 3,399.47 kms