There are
2,949 mi
from San Clemente, CA to Claremont, NH
That's the driving distance. It would take 2 days 5 hours to go from San Clemente, California to Claremont, New Hampshire.
The flight distance (direct flight from San Clemente, CA to Claremont, NH) is 2,512.33 mi.
2,949 mi = 4,745.73 kms