The system for automatically registering flight instructions for aircraft comprises a flight computer delivering a first set of flight instructions defining a pre established flight plan, called CONS_FMS, the system comprising a display, the display representing the current flight instructions, the system comprising a device for controlling instructions which comprises means of adjusting a second set of flight instructions, called CONS_PILOTE, the system comprising a manager of instructions originating from air traffic control, the instructions being transmitted by means of a data link, said instructions defining a third set of instructions, called CONS_CONTROLEUR.The system comprises:means of viewing the third set of instructions;means of confirming said instructions making it possible to display them on the display separately to the sides of the current flight instructions, and;means of activating said instructions making it possible to replace the current instructions.