There are
2,756 mi
from Allentown, PA to Newcastle, WA
That's the driving distance. It would take 2 days 1 hour to go from Allentown, Pennsylvania to Newcastle, Washington.
The flight distance (direct flight from Allentown, PA to Newcastle, WA) is 2,328.87 mi.
2,756 mi = 4,435.28 kms