There are
2,736 mi
from Simi Valley, CA to Allentown, PA
That's the driving distance. It would take 2 days to go from Simi Valley, California to Allentown, Pennsylvania.
The flight distance (direct flight from Simi Valley, CA to Allentown, PA) is 2,390.43 mi.
2,736 mi = 3.22 kms