There are
687 mi
from Chattanooga, TN to Elkton, MD
That's the driving distance. It would take 12 hours 55 mins to go from Chattanooga, Tennessee to Elkton, Maryland.
The flight distance (direct flight from Chattanooga, TN to Elkton, MD) is 608.10 mi.
687 mi = 1,106.42 kms