In 1928, the road between Woodbine and PA 74 in Airville was designated PA 851 while PA 124 was designated onto the road between north of York Furnace and Craley. PA 923 was designated in 1930 as a short spur from PA 124 south to York Furnace. In 1937, PA 124 was rerouted to head south from York Furnace to PA 851 in Fawn Grove, replacing all of PA 923 along with the alignment of PA 851 between Woodbine and Airville. PA 425 was designated in the 1960s to replace the stretch of PA 124 between PA 851 in Fawn Grove and PA 624 in Craley, with the eastern terminus of PA 124 cut back to Craley.