There are
2,953 mi
from San Mateo, CA to Westbury, NY
That's the driving distance. It would take 2 days 4 hours to go from San Mateo, California to Westbury, New York.
The flight distance (direct flight from San Mateo, CA to Westbury, NY) is 2,586.85 mi.
2,953 mi = 3.22 kms