The revolution of Urban Air Mobility encompasses new concepts of operations, business cases, applicable regulations, and stakeholders and end users. This new business sector needs to be secured, invented, refined, structured and industrialized while staying sustainable and interoperable within the U-space framework. U-space and Urban Air Mobility (UAM) are topics where a fast increase in research, innovation and real use implementation is previewed in this project, where SESAR is highly interested to foster and facilitate the development of avant-garde solutions in UAM. In the near future, safe, secure, green and acceptable UAM solutions will bring seamless freight, emergency, security and mobility services. Operators, Regulators, Traffic Management, End Users, Public and Airborne industry must collaborate to ensure UAM vehicle airworthiness and viable operations. The consortium is composed of all relevant stakeholders: • Aerospace Research Institutes • Aerospace Universities • UAS and eVTOLs (Air Taxis) • Aviation and air traffic management engineering and consultancy • Aviation data management • Air Navigation Service Providers • Airport Authorities • U-Space Service Providers • UAS operators • Ground Infrastructure Providers (vertiports…) • Mobile Communication Service Providers • Advisory Board: National Civil Aviation Authorities, City Councils and Regional Governments, European bodies The study proposes to design and deliver a detailed concept of operations and definition of urban air missions followed by simulations and a large real flight demonstration campaign to verify and validate the concepts. Our project will allow UAM stakeholders to specify various Use cases applicable to logistics and urban transport of passengers, to design or integrate UAM environment, to test the UAS ground and airborne platforms and finally, to assess safety, security, sustainability and public acceptance. The flight demonstrations will accumulate more than 100 hours and flights.