There are
2,626 mi
from San Mateo, CA to Dunkirk, NY
That's the driving distance. It would take 1 day 22 hours to go from San Mateo, California to Dunkirk, New York.
The flight distance (direct flight from San Mateo, CA to Dunkirk, NY) is 2,275.36 mi.
2,626 mi = 3.22 kms