There are
2,859 mi
from San Mateo, CA to Bethlehem, PA
That's the driving distance. It would take 2 days 2 hours to go from San Mateo, California to Bethlehem, Pennsylvania.
The flight distance (direct flight from San Mateo, CA to Bethlehem, PA) is 2,496.93 mi.
2,859 mi = 3.22 kms