The concept of mixed migration flows is one of the key components of the comprehensive approach to international legal regulation of migration. Whereas international cooperation on the issues of migration has its most considerable outcomes in specific fields, not in the overall view or framework for international legal regulation of migration taken as a whole, differentiating between flows, that are governed separately, represents for states more a subject of concern than that of clarity and action. The present article offers a view on the emergence, evolution, application in the practice of the leading specialized international interstate organizations and prospectives of the further development of the mixed migration flows concept, elaborated on basis of relevant normative and doctrinal sources including the most recent ones.