There are
798 mi
from Chattanooga, TN to Gainesville, TX
That's the driving distance. It would take 14 hours 28 mins to go from Chattanooga, Tennessee to Gainesville, Texas.
The flight distance (direct flight from Chattanooga, TN to Gainesville, TX) is 681.25 mi.
798 mi = 1,284.69 kms