There are
2,332 mi
from Great Falls, MT to Warwick, RI
That's the driving distance. It would take 1 day 18 hours to go from Great Falls, Montana to Warwick, Rhode Island.
The flight distance (direct flight from Great Falls, MT to Warwick, RI) is 1,979.89 mi.
2,332 mi = 3,752.64 kms