There are
867 mi
from Allentown, PA to Hazelwood, MO
That's the driving distance. It would take 16 hours 34 mins to go from Allentown, Pennsylvania to Hazelwood, Missouri.
The flight distance (direct flight from Allentown, PA to Hazelwood, MO) is 800.29 mi.
867 mi = 1,395.31 kms