There are
2,497 mi
from Fountain Valley, CA to Dunkirk, NY
That's the driving distance. It would take 1 day 20 hours to go from Fountain Valley, California to Dunkirk, New York.
The flight distance (direct flight from Fountain Valley, CA to Dunkirk, NY) is 2,165.11 mi.
2,497 mi = 4,019.29 kms