The future of aviation is looking towards hydrogen as a promising option, as highlighted by a new report from IDTechEx projecting the hydrogen airplane market to reach US$28.4 billion by 2045. While the potential for hydrogen-powered flights is substantial, there are significant hurdles to overcome before commercialization becomes a reality. Infrastructure investments at airports, particularly in liquid hydrogen handling, are crucial for the uptake of hydrogen aviation. Key airports in the US, including Los Angeles, Las Vegas, Atlanta, Denver, Dallas Fort Worth, and Chicago O'Hare, are identified as ideal for hydrogen-powered air travel, with the possibility to cover a considerable share of domestic air travel demand if expanded to a network of 21 airports. Despite the opportunities, challenges persist in the advancement of hydrogen flight technology. Issues like certification, fuel cell efficiency, motor power, and hydrogen storage need to be addressed. However, the report emphasizes that airports investing in LH2 refueling technologies will play a pivotal role in kick-starting the hydrogen aviation industry. IDTechEx's report, 'Sustainable Future Aviation 2025-2045: Trends, Technologies, Forecasts,' offers a comprehensive analysis of hydrogen and electric flight technologies, forecasting growth in plane sales, revenue, battery demand for electric planes, and motor demand for aircraft. This data-driven insight sheds light on the potential trajectory of the aviation industry towards sustainability and innovation.