A method of manufacturing a wing assembly for joining to a fuselage of an aircraft includes the steps of loading a center wing section into a wing join station, loading a right wing section into the wing join station proximate to the center wing section, loading a left wing section into the wing join station proximate to the center wing section, joining the right and left wing sections to the center wing section to form a complete wing assembly, moving the complete wing assembly to a processing station, performing drilling operations on the complete wing assembly at the processing station, installing fasteners in the complete wing assembly at the processing station, and moving the complete wing assembly to a wing-body join station to join the complete wing assembly to the fuselage.