There are
1,880 mi
from Walnut Creek, CA to Katy, TX
That's the driving distance. It would take 1 day 8 hours to go from Walnut Creek, California to Katy, Texas.
The flight distance (direct flight from Walnut Creek, CA to Katy, TX) is 1,600.27 mi.
1,880 mi = 3,025.43 kms