There are
1,990 mi
from Walnut Creek, CA to Troy, MO
That's the driving distance. It would take 1 day 10 hours to go from Walnut Creek, California to Troy, Missouri.
The flight distance (direct flight from Walnut Creek, CA to Troy, MO) is 1,675.61 mi.
1,990 mi = 3,202.39 kms