There are
2,329 mi
from Vacaville, CA to Gallatin, TN
That's the driving distance. It would take 1 day 16 hours to go from Vacaville, California to Gallatin, Tennessee.
The flight distance (direct flight from Vacaville, CA to Gallatin, TN) is 1,944.24 mi.
2,329 mi = 3.22 kms