There are
2,637 mi
from Half Moon Bay, CA to Dunkirk, NY
That's the driving distance. It would take 1 day 22 hours to go from Half Moon Bay, California to Dunkirk, New York.
The flight distance (direct flight from Half Moon Bay, CA to Dunkirk, NY) is 2,283.19 mi.
2,637 mi = 4,243.09 kms