There are
2,674 mi
from Allentown, PA to Rialto, CA
That's the driving distance. It would take 1 day 23 hours to go from Allentown, Pennsylvania to Rialto, California.
The flight distance (direct flight from Allentown, PA to Rialto, CA) is 2,321.04 mi.
2,674 mi = 3.22 kms