There are
1,094 mi
from Dekalb, IL to Gainesville, FL
That's the driving distance. It would take 20 hours 25 mins to go from Dekalb, Illinois to Gainesville, Florida.
The flight distance (direct flight from Dekalb, IL to Gainesville, FL) is 920.88 mi.
1,094 mi = 1,759.91 kms