There are
2,847 mi
from Allentown, PA to Pacifica, CA
That's the driving distance. It would take 2 days 2 hours to go from Allentown, Pennsylvania to Pacifica, California.
The flight distance (direct flight from Allentown, PA to Pacifica, CA) is 2,498.09 mi.
2,847 mi = 3.22 kms