There are
990 mi
from Waltham, MA to New Lenox, IL
That's the driving distance. It would take 18 hours 41 mins to go from Waltham, Massachusetts to New Lenox, Illinois.
The flight distance (direct flight from Waltham, MA to New Lenox, IL) is 860.45 mi.
990 mi = 1,593.83 kms