There are
859 mi
from Allentown, PA to Swansea, IL
That's the driving distance. It would take 16 hours 27 mins to go from Allentown, Pennsylvania to Swansea, Illinois.
The flight distance (direct flight from Allentown, PA to Swansea, IL) is 784.44 mi.
859 mi = 1,382.49 kms