IDTechEx's new report projects a promising future for the hydrogen airplane market, estimating it to grow to US$28.4 billion by 2045, with a focus on narrow-body commercial airliners powered by hydrogen. While hydrogen offers high energy density, its volumetric efficiency remains a challenge. Compression techniques like pressurizing to 700 bar or using liquid hydrogen can enhance energy storage and range. Transitioning to fuel-cell electric propulsion systems can further extend the range of hydrogen planes. Key airports in the US, such as Los Angeles and New York, are highlighted as suitable for hydrogen-powered flights due to their high passenger volume and short distances between them. However, challenges like technical certifications and infrastructure investment need to be addressed for hydrogen commercial flights to become a reality. IDTechEx emphasizes the importance of strategic airport investments in LH2 refueling technologies to kick-start the hydrogen-air travel market. The report also discusses the growth potential of electric and hydrogen flight technologies, outlining forecasts on plane sales, revenue, battery demand, and motor demand within the aviation industry. The shift towards sustainable aviation solutions is evident as the industry explores the possibilities of electric planes, hydrogen planes, and the crucial role of Sustainable Aviation Fuels (SAF) for long-distance air travel.