Aviation stands as one of the toughest industries to decarbonize, with significant challenges in transitioning to sustainable energy sources. The weight of fuel in commercial airliners, reaching up to 40% of the total weight, poses a major hurdle compared to the relatively easier conversion of cars to electric power. In a recent IDTechEx webinar, the technical complexities of developing electric and hydrogen-powered planes were discussed thoroughly. Issues such as the limitations of battery weight, low gravimetric energy density, volumetric energy density of hydrogen, and the power constraints of electric motors were highlighted. The webinar emphasized the importance of adopting long-term solutions like electricity, hydrogen, and Sustainable Aviation Fuel (SAF) to address the decarbonization challenges effectively. Key topics covered included the weight limits for planes concerning battery installation, potential ranges achievable with battery and hydrogen power, volume constraints for hydrogen, and the distribution of the air travel market based on flight distances. Furthermore, the webinar provided insights from the upcoming IDTechEx report titled 'Sustainable Future Aviation 2025-2045: Trends, Technologies, Forecasts'. This report aims to delve deeper into the trends, technologies, and forecasts surrounding sustainable aviation, shedding light on the market opportunities for electric planes, hydrogen-powered aircraft, and the indispensable role of SAF in enabling long-distance air travel. By exploring these challenges and solutions, the webinar offered a positive outlook on the future of decarbonizing aviation and the potential for innovative technologies to reshape the industry.