There are
685 mi
from Allentown, PA to Crossville, TN
That's the driving distance. It would take 12 hours 48 mins to go from Allentown, Pennsylvania to Crossville, Tennessee.
The flight distance (direct flight from Allentown, PA to Crossville, TN) is 608.72 mi.
685 mi = 1,102.93 kms