There are
2,959 mi
from Half Moon Bay, CA to Hempstead, NY
That's the driving distance. It would take 2 days 4 hours to go from Half Moon Bay, California to Hempstead, New York.
The flight distance (direct flight from Half Moon Bay, CA to Hempstead, NY) is 2,593.63 mi.
2,959 mi = 4,761.52 kms