There are
889 mi
from Allentown, PA to Opelika, AL
That's the driving distance. It would take 16 hours 58 mins to go from Allentown, Pennsylvania to Opelika, Alabama.
The flight distance (direct flight from Allentown, PA to Opelika, AL) is 775.75 mi.
889 mi = 1,431.15 kms