There are
734 mi
from Dekalb, IL to Ithaca, NY
That's the driving distance. It would take 14 hours 9 mins to go from Dekalb, Illinois to Ithaca, New York.
The flight distance (direct flight from Dekalb, IL to Ithaca, NY) is 627.53 mi.
734 mi = 1,181.98 kms