Hydrogen-electric engines are emerging as a transformative technology in aviation, offering a pathway to zero-emission flights. Utilizing hydrogen fuel cells, these engines convert hydrogen gas into electricity, which powers electric motors and emits only water vapor, significantly reducing the climate impact compared to traditional kerosene-fueled flights. Industry leaders like ZeroAvia and Airbus are at the forefront of developing and testing hydrogen-powered aircraft, particularly for regional flights where this technology is most viable. The adoption of hydrogen in aviation faces challenges such as infrastructure development and cost, yet the global push for decarbonization, supported by government policies and corporate partnerships, is accelerating progress. As hydrogen production becomes more efficient and cost-effective, the aviation industry anticipates a significant shift toward sustainable energy by the 2030s. Hydrogen-electric engines not only promise environmental benefits, including noise reduction, but also represent a crucial step in the aviation sector's transition to clean energy, supported by advances in safety and infrastructure development.