There are
2,143 mi
from Chattanooga, TN to San Marcos, CA
That's the driving distance. It would take 1 day 13 hours to go from Chattanooga, Tennessee to San Marcos, California.
The flight distance (direct flight from Chattanooga, TN to San Marcos, CA) is 1,819.75 mi.
2,143 mi = 3,448.90 kms