There are
780 mi
from Suwanee, GA to Dekalb, IL
That's the driving distance. It would take 14 hours 48 mins to go from Suwanee, Georgia to Dekalb, Illinois.
The flight distance (direct flight from Suwanee, GA to Dekalb, IL) is 600.75 mi.
780 mi = 1,255.85 kms