There are
677 mi
from Garland, TX to Shelbyville, TN
That's the driving distance. It would take 12 hours 24 mins to go from Garland, Texas to Shelbyville, Tennessee.
The flight distance (direct flight from Garland, TX to Shelbyville, TN) is 607.85 mi.
677 mi = 1,090.04 kms