The Aerospace Europe Conference 2021 will be held in Warsaw, 23-26 November 2021. The conference will be organized by CEAS together with Polish Society of Aeronautics and Astronautics , Łukasiewicz Research Network – Institute of Aviation & Warsaw University of Technology. Due to the uncertainty related to the COVID-19 pandemic, two forms of conference are considered – traditional (face-to-face) and on-line. Maybe the hybrid form that will combine classical sessions for limited number of participants with on-line connection will be the best solution.