There are
3,056 mi
from Walnut Creek, CA to Warwick, RI
That's the driving distance. It would take 2 days 6 hours to go from Walnut Creek, California to Warwick, Rhode Island.
The flight distance (direct flight from Walnut Creek, CA to Warwick, RI) is 2,662.45 mi.
3,056 mi = 4,918.00 kms