There are
1,095 mi
from Gainesville, FL to Dekalb, IL
That's the driving distance. It would take 20 hours 31 mins to go from Gainesville, Florida to Dekalb, Illinois.
The flight distance (direct flight from Gainesville, FL to Dekalb, IL) is 920.88 mi.
1,095 mi = 1.61 kms