There are
2,902 mi
from Vallejo, CA to Hempstead, NY
That's the driving distance. It would take 2 days 3 hours to go from Vallejo, California to Hempstead, New York.
The flight distance (direct flight from Vallejo, CA to Hempstead, NY) is 2,569.57 mi.
2,902 mi = 3.22 kms