Given the geo-economic structure of the region, efficient and reliable air transport is of great importance for the mobility of people and businesses in the Baltic Sea Region (BSR). Air transport not only provides access to peripheral areas but also helps to connect regions on all sides of the Baltic Sea. As many flights cover short distances in an environmentally sensitive area, the BSR has great potential to benefit from the introduction of hydrogen-powered aircraft, which are expected to come onto the market in the coming years. The BSR HyAirport project aims to facilitate the early adoption of this key technology in the BSR by preparing airports for storing, handling, and delivering green hydrogen as a future energy source in aviation. Common challenges to be addressed by the partnership include the evaluation of options and elaboration of concepts for the regional supply of green hydrogen to airports according to local demand, legal and safety requirements related to h2 storage and handling at airports, and the development and testing of equipment and procedures for refueling and handling hydrogen-powered aircraft. With a partnership of airports, technology partners, airlines, and research institutions from across the programme area, the project will create a unique (maybe leading) platform for the joint development, implementation, and testing of practical solutions serving the common challenges and specific needs of hydrogen-powered aviation in the BSR region.