There are
2,692 mi
from Irvine, CA to Bethlehem, PA
That's the driving distance. It would take 2 days to go from Irvine, California to Bethlehem, Pennsylvania.
The flight distance (direct flight from Irvine, CA to Bethlehem, PA) is 2,361.39 mi.
2,692 mi = 4,332.81 kms