There are
867 mi
from Dekalb, IL to Peekskill, NY
That's the driving distance. It would take 16 hours 21 mins to go from Dekalb, Illinois to Peekskill, New York.
The flight distance (direct flight from Dekalb, IL to Peekskill, NY) is 766.43 mi.
867 mi = 1,396.04 kms