There are
2,097 mi
from Schaumburg, IL to Walnut Creek, CA
That's the driving distance. It would take 1 day 12 hours to go from Schaumburg, Illinois to Walnut Creek, California.
The flight distance (direct flight from Schaumburg, IL to Walnut Creek, CA) is 1,809.69 mi.
2,097 mi = 3,374.38 kms