There are
2,709 mi
from Allentown, PA to Rosemead, CA
That's the driving distance. It would take 2 days to go from Allentown, Pennsylvania to Rosemead, California.
The flight distance (direct flight from Allentown, PA to Rosemead, CA) is 2,358.59 mi.
2,709 mi = 3.22 kms