There are
1,359 mi
from Irvine, CA to San Marcos, TX
That's the driving distance. It would take 23 hours 24 mins to go from Irvine, California to San Marcos, Texas.
The flight distance (direct flight from Irvine, CA to San Marcos, TX) is 1,193.21 mi.
1,359 mi = 1.61 kms