There are
673 mi
from Garland, TX to Smyrna, TN
That's the driving distance. It would take 12 hours 1 min to go from Garland, Texas to Smyrna, Tennessee.
The flight distance (direct flight from Garland, TX to Smyrna, TN) is 614.03 mi.
673 mi = 1,082.62 kms