There are
2,098 mi
from Gallatin, TN to Porterville, CA
That's the driving distance. It would take 1 day 12 hours to go from Gallatin, Tennessee to Porterville, California.
The flight distance (direct flight from Gallatin, TN to Porterville, CA) is 1,806.78 mi.
2,098 mi = 3,376.01 kms