There are
2,080 mi
from Walnut Creek, CA to Sun Prairie, WI
That's the driving distance. It would take 1 day 12 hours to go from Walnut Creek, California to Sun Prairie, Wisconsin.
The flight distance (direct flight from Walnut Creek, CA to Sun Prairie, WI) is 1,751.08 mi.
2,080 mi = 3,347.12 kms