There are
2,687 mi
from Allentown, PA to Norwalk, CA
That's the driving distance. It would take 2 days to go from Allentown, Pennsylvania to Norwalk, California.
The flight distance (direct flight from Allentown, PA to Norwalk, CA) is 2,364.04 mi.
2,687 mi = 4,323.70 kms