This book is a collection of peer-reviewed articles from the 3rd International Conference on Green Aviation (ICGA2025). It’s co-organized by the Chinese Society of Aeronautics and Astronautics (CSAA), International Green Aviation Organization (IAGA), Shaanxi Association for Science and Technology (SNAST), Northwestern Polytechnical University (NPU), and Beihang University (BUAA). taking place from Oct. 21-24, 2025 in Xi’an, China. The conference serves as a platform for global experts and industry leaders to share insights about cutting-edge solutions on achieving a sustainable future for aviation. Focusing on themes such as green aero-power, sustainable aviation fuels (SAF), green aviation smart structure and manufacturing, aviation digitalization and intelligence, advanced air mobility (AAM), and green aviation development strategy, ICGA emphasizes the role of technological advancement and international collaboration in addressing environmental challenges. It inspires the global aviation community to work together for a net-zero future.