There are
1,588 mi
from Walnut Creek, CA to Del Rio, TX
That's the driving distance. It would take 1 day 4 hours to go from Walnut Creek, California to Del Rio, Texas.
The flight distance (direct flight from Walnut Creek, CA to Del Rio, TX) is 1,348.70 mi.
1,588 mi = 2,556.02 kms