There are
3,090 mi
from Warwick, RI to San Mateo, CA
That's the driving distance. It would take 2 days 6 hours to go from Warwick, Rhode Island to San Mateo, California.
The flight distance (direct flight from Warwick, RI to San Mateo, CA) is 2,684.64 mi.
3,090 mi = 4.83 kms