There are
767 mi
from Chattanooga, TN to Denison, TX
That's the driving distance. It would take 13 hours 58 mins to go from Chattanooga, Tennessee to Denison, Texas.
The flight distance (direct flight from Chattanooga, TN to Denison, TX) is 645.86 mi.
767 mi = 1,233.72 kms