There are
814 mi
from Garland, TX to Suwanee, GA
That's the driving distance. It would take 14 hours 48 mins to go from Garland, Texas to Suwanee, Georgia.
The flight distance (direct flight from Garland, TX to Suwanee, GA) is 728.04 mi.
814 mi = 1,310.23 kms