There are
983 mi
from Warwick, RI to Deerfield, IL
That's the driving distance. It would take 18 hours 50 mins to go from Warwick, Rhode Island to Deerfield, Illinois.
The flight distance (direct flight from Warwick, RI to Deerfield, IL) is 843.71 mi.
983 mi = 1,581.27 kms