There are
2,776 mi
from Santa Barbara, CA to Allentown, PA
That's the driving distance. It would take 2 days 1 hour to go from Santa Barbara, California to Allentown, Pennsylvania.
The flight distance (direct flight from Santa Barbara, CA to Allentown, PA) is 2,434.25 mi.
2,776 mi = 4,467.43 kms