There are
2,086 mi
from Elgin, IL to Walnut Creek, CA
That's the driving distance. It would take 1 day 12 hours to go from Elgin, Illinois to Walnut Creek, California.
The flight distance (direct flight from Elgin, IL to Walnut Creek, CA) is 1,799.54 mi.
2,086 mi = 3.22 kms