To reach Europe climate neutrality by 2050 as ambitioned by the Green Deal strategy, it is necessary to drastically reduce emissions from aviation. Clean Aviation Joint Undertaking has set out a very ambitious innovation programme to achieve this goal but it is also necessary to create synergy with the different aeronautical regional/national funding programmes in order to create leverage effects and maximise funding impact. ECARE project’s objective is to draw linkage between European/national/regional roadmaps and aeronautical stakeholders and co-create synergies through a pilot covering 4 major aeronautical European regions (Occitanie and Nouvelle Aquitaine in France, Hamburg Land in Germany and Campania in Italy) with the aim of creating a methodology expandable to other aeronautical European regions. ECARE digital platform will provide (i) a mapping of funding opportunities, relevant projects, scientific and industrial resources, (ii) a forum for exchange of information. The ECARE Stakeholders Group (funding bodies, clusters and other aeronautical stakeholders) will foster and spread ECARE methodology. After more than a hundred interviews with aviation players, national and transnational workshops will co-elaborate and provide recommendations for CAJU Phase 2 implementation by 2025. The consortium is composed of 3 major European aeronautical clusters (Aerospace Valley, Hamburg Aviation and Campania Aerospace District) and one Belgian SME specialized in aeronautics technology services (EASN-TIS). All are experts in their domain and other European aeronautical clusters will be involved inter alia via the EACP (European Aeronautical Clusters Partnership) partnership coordinated by Hamburg Aviation cluster. Eventually the project is expected to bring together more than 300 entities via the platform and 30 ECARE Stakeholders Group members that will collaborate on the synergy to help the European aviation achieve its ambitious goals.