There are
2,561 mi
from San Clemente, CA to Tonawanda, NY
That's the driving distance. It would take 1 day 21 hours to go from San Clemente, California to Tonawanda, New York.
The flight distance (direct flight from San Clemente, CA to Tonawanda, NY) is 2,183.63 mi.
2,561 mi = 4,122.15 kms