There are
2,622 mi
from Allentown, PA to Kennewick, WA
That's the driving distance. It would take 1 day 22 hours to go from Allentown, Pennsylvania to Kennewick, Washington.
The flight distance (direct flight from Allentown, PA to Kennewick, WA) is 2,196.21 mi.
2,622 mi = 3.22 kms