There are
2,508 mi
from San Clemente, CA to Jamestown, NY
That's the driving distance. It would take 1 day 20 hours to go from San Clemente, California to Jamestown, New York.
The flight distance (direct flight from San Clemente, CA to Jamestown, NY) is 2,160.20 mi.
2,508 mi = 4,035.87 kms