There are
932 mi
from Warwick, RI to Merrillville, IN
That's the driving distance. It would take 17 hours 46 mins to go from Warwick, Rhode Island to Merrillville, Indiana.
The flight distance (direct flight from Warwick, RI to Merrillville, IN) is 821.45 mi.
932 mi = 1,500.40 kms