The aviation industry, responsible for almost 4% of global warming, faces the urgent task of decarbonising to mitigate its environmental impact, with hydrogen emerging as a promising solution. While challenges in hydrogen availability persist, advancements in green hydrogen production are driven by factors like renewable energy growth and societal sustainability goals. Fuel blending initiatives offer a transitional approach to reduce emissions, paving the way for the eventual shift to hydrogen-only flights, supported by ongoing research and development efforts worldwide. Technological hurdles, such as safe storage and combustion of hydrogen, are being addressed, with initiatives like Airbus' Zero-E program and EU's Green Deal actively promoting hydrogen as a key technology for sustainable aviation. The broader energy transition is also benefiting from aviation's hydrogen exploration, with potential for hydrogen infrastructure at airports and applications beyond air travel, showcasing the interconnectedness of energy innovation across sectors.