There are
761 mi
from Allentown, PA to Algonquin, IL
That's the driving distance. It would take 14 hours 24 mins to go from Allentown, Pennsylvania to Algonquin, Illinois.
The flight distance (direct flight from Allentown, PA to Algonquin, IL) is 671.74 mi.
761 mi = 1,225.29 kms