There are
2,710 mi
from Bethlehem, PA to Monrovia, CA
That's the driving distance. It would take 2 days to go from Bethlehem, Pennsylvania to Monrovia, California.
The flight distance (direct flight from Bethlehem, PA to Monrovia, CA) is 2,359.30 mi.
2,710 mi = 3.22 kms