There are
2,029 mi
from Gallatin, TN to Tustin, CA
That's the driving distance. It would take 1 day 11 hours to go from Gallatin, Tennessee to Tustin, California.
The flight distance (direct flight from Gallatin, TN to Tustin, CA) is 1,776.10 mi.
2,029 mi = 3,264.80 kms