There are
2,048 mi
from Walnut Creek, CA to Arnold, MO
That's the driving distance. It would take 1 day 11 hours to go from Walnut Creek, California to Arnold, Missouri.
The flight distance (direct flight from Walnut Creek, CA to Arnold, MO) is 1,713.11 mi.
2,048 mi = 3,295.86 kms