There are
2,987 mi
from San Marcos, CA to Warwick, RI
That's the driving distance. It would take 2 days 5 hours to go from San Marcos, California to Warwick, Rhode Island.
The flight distance (direct flight from San Marcos, CA to Warwick, RI) is 2,547.86 mi.
2,987 mi = 3.22 kms