There are
998 mi
from Bethlehem, PA to Wausau, WI
That's the driving distance. It would take 18 hours 52 mins to go from Bethlehem, Pennsylvania to Wausau, Wisconsin.
The flight distance (direct flight from Bethlehem, PA to Wausau, WI) is 781.16 mi.
998 mi = 1,606.35 kms