There are
892 mi
from Rockford, IL to Peekskill, NY
That's the driving distance. It would take 16 hours 51 mins to go from Rockford, Illinois to Peekskill, New York.
The flight distance (direct flight from Rockford, IL to Peekskill, NY) is 783.68 mi.
892 mi = 1,435.31 kms