There are
2,243 mi
from Gallatin, TN to Susanville, CA
That's the driving distance. It would take 1 day 15 hours to go from Gallatin, Tennessee to Susanville, California.
The flight distance (direct flight from Gallatin, TN to Susanville, CA) is 1,861.13 mi.
2,243 mi = 3,609.93 kms