There are
2,117 mi
from Palatine, IL to Walnut Creek, CA
That's the driving distance. It would take 1 day 12 hours to go from Palatine, Illinois to Walnut Creek, California.
The flight distance (direct flight from Palatine, IL to Walnut Creek, CA) is 1,812 mi.
2,117 mi = 3,407.44 kms