There are
2,863 mi
from South San Francisco, CA to Phoenixville, PA
That's the driving distance. It would take 2 days 2 hours to go from South San Francisco, California to Phoenixville, Pennsylvania.
The flight distance (direct flight from South San Francisco, CA to Phoenixville, PA) is 2,498.24 mi.
2,863 mi = 4,607.67 kms