There are
475 mi
from Bethlehem, PA to Mt Airy, NC
That's the driving distance. It would take 9 hours 4 mins to go from Bethlehem, Pennsylvania to Mt Airy, North Carolina.
The flight distance (direct flight from Bethlehem, PA to Mt Airy, NC) is 401.52 mi.
475 mi = 763.66 kms