There are
2,650 mi
from San Mateo, CA to Uniontown, PA
That's the driving distance. It would take 1 day 22 hours to go from San Mateo, California to Uniontown, Pennsylvania.
The flight distance (direct flight from San Mateo, CA to Uniontown, PA) is 2,280.48 mi.
2,650 mi = 3.22 kms