There are
2,930 mi
from Allentown, PA to Seaside, CA
That's the driving distance. It would take 2 days 3 hours to go from Allentown, Pennsylvania to Seaside, California.
The flight distance (direct flight from Allentown, PA to Seaside, CA) is 2,487.41 mi.
2,930 mi = 3.22 kms