Abstract: An aircraft landing assistance system includes a processing unit configured to determine whether there is total failure of the aircraft's engines and, if yes, to determine a set of airports at which the aircraft could land from its current position, taking into account its current energy and current configuration. For each airport, the system determines a runway on which the aircraft could land and at least one possible landing direction of the aircraft on this runway and determines a reference point ahead of each runway, corresponding to a deployment point for the landing gear and a point of changing from a smooth configuration of the aircraft to a non-smooth configuration, to allow the aircraft to land on the runway. The system also commands the display, on an aircraft navigation screen, of a depiction of each of the runways and the reference points associated with these runways.