There are
1,952 mi
from Walnut Creek, CA to San Juan, TX
That's the driving distance. It would take 1 day 9 hours to go from Walnut Creek, California to San Juan, Texas.
The flight distance (direct flight from Walnut Creek, CA to San Juan, TX) is 1,610.30 mi.
1,952 mi = 3,141.91 kms