A method for automatically proposing an air conflict resolution, the method comprising a step of receiving air conflict and air situation data at a time when an air conflict is detected, said method being characterised in that it comprises the steps of: - determining a conflict category associated with said detected air conflict based on said conflict data; - determining a degree of relevance in proposing a resolution to said air conflict according to said category and said air situation; - determining one or more types of resolution to be applied to resolve said detected air conflict according to said degree of relevance; - determining a set of alternative trajectories corresponding to said one or more types of resolution; - determining a set of candidate trajectories from among the set of alternative trajectories, a candidate trajectory being an alternative trajectory which does not provoke an air conflict; - selecting , from among the candidate trajectories, a candidate trajectory which fulfils a selection criterion relating to the operational relevance of the candidate trajectories and to the acceptability of the candidate trajectories by the flight plan management system, the selecting step comprising the sub-steps of associating a degree of operational relevance with each candidate trajectory according to a number of operational relevance criteria, classifying the candidate trajectories in order of operational relevance as a function of the degrees of relevance associated with said trajectories, and selecting, from among the candidate trajectories classified in order of operational relevance, the most relevant candidate trajectory which is accepted by the flight plan management system and which allows the resolution of said air conflict without generating other air conflicts; - returning said candidate trajectory, said candidate trajectory being saved and re-evaluated as long as it does not provoke an air conflict or has not been accepted by an air traffic controller. - determining a conflict category associated with said detected air conflict based on said conflict data; - determining a degree of relevance in proposing a resolution to said air conflict according to said category and said air situation; - determining one or more types of resolution to be applied to resolve said detected air conflict according to said degree of relevance; - determining a set of alternative trajectories corresponding to said one or more types of resolution; - determining a set of candidate trajectories from among the set of alternative trajectories, a candidate trajectory being an alternative trajectory which does not provoke an air conflict; - selecting , from among the candidate trajectories, a candidate trajectory which fulfils a selection criterion relating to the operational relevance of the candidate trajectories and to the acceptability of the candidate trajectories by the flight plan management system, the selecting step comprising the sub-steps of associating a degree of operational relevance with each candidate trajectory according to a number of operational relevance criteria, classifying the candidate trajectories in order of operational relevance as a function of the degrees of relevance associated with said trajectories, and selecting, from among the candidate trajectories classified in order of operational relevance, the most relevant candidate trajectory which is accepted by the flight plan management system and which allows the resolution of said air conflict without generating other air conflicts; - returning said candidate trajectory, said candidate trajectory being saved and re-evaluated as long as it does not provoke an air conflict or has not been accepted by an air traffic controller. <EOS>