There are
2,958 mi
from Allentown, PA to Eureka, CA
That's the driving distance. It would take 2 days 4 hours to go from Allentown, Pennsylvania to Eureka, California.
The flight distance (direct flight from Allentown, PA to Eureka, CA) is 2,515.60 mi.
2,958 mi = 3.22 kms