There are
1,356 mi
from San Clemente, CA to Seguin, TX
That's the driving distance. It would take 23 hours 7 mins to go from San Clemente, California to Seguin, Texas.
The flight distance (direct flight from San Clemente, CA to Seguin, TX) is 1,185.81 mi.
1,356 mi = 2,181.85 kms