There are
2,776 mi
from Allentown, PA to Santa Barbara, CA
That's the driving distance. It would take 2 days 1 hour to go from Allentown, Pennsylvania to Santa Barbara, California.
The flight distance (direct flight from Allentown, PA to Santa Barbara, CA) is 2,434.25 mi.
2,776 mi = 4,467.53 kms