There are
2,168 mi
from Walnut Creek, CA to Mequon, WI
That's the driving distance. It would take 1 day 13 hours to go from Walnut Creek, California to Mequon, Wisconsin.
The flight distance (direct flight from Walnut Creek, CA to Mequon, WI) is 1,812.76 mi.
2,168 mi = 3,489.73 kms