There are
2,856 mi
from Allentown, PA to Ukiah, CA
That's the driving distance. It would take 2 days 2 hours to go from Allentown, Pennsylvania to Ukiah, California.
The flight distance (direct flight from Allentown, PA to Ukiah, CA) is 2,500.70 mi.
2,856 mi = 3.22 kms