There are
1,948 mi
from Thornton, CO to Cranston, RI
That's the driving distance. It would take 1 day 11 hours to go from Thornton, Colorado to Cranston, Rhode Island.
The flight distance (direct flight from Thornton, CO to Cranston, RI) is 1,747.19 mi.
1,948 mi = 1.61 kms