There are
2,715 mi
from Glendale, CA to Allentown, PA
That's the driving distance. It would take 2 days to go from Glendale, California to Allentown, Pennsylvania.
The flight distance (direct flight from Glendale, CA to Allentown, PA) is 2,366.40 mi.
2,715 mi = 3.22 kms