There are
2,456 mi
from Allentown, PA to Hayden, ID
That's the driving distance. It would take 1 day 19 hours to go from Allentown, Pennsylvania to Hayden, Idaho.
The flight distance (direct flight from Allentown, PA to Hayden, ID) is 2,078.54 mi.
2,456 mi = 3.22 kms