There are
2,716 mi
from Allentown, PA to Glendale, CA
That's the driving distance. It would take 2 days to go from Allentown, Pennsylvania to Glendale, California.
The flight distance (direct flight from Allentown, PA to Glendale, CA) is 2,366.40 mi.
2,716 mi = 3.22 kms