Christchurch Airport in New Zealand is on a mission to become the world's first truly 'green' airport by challenging the aviation industry's high-carbon footprint. Over the past two decades, the airport has made significant strides in sustainability, cutting its direct operational emissions by a remarkable 92% compared to a decade ago. This achievement was made possible through innovative practices like utilizing geothermal heating, electric ground power units, electric fire trucks, and automated energy management systems. The airport's sustainability strategy is influenced by Māori principles, emphasizing interconnectedness and the importance of balancing environmental limits with social standards. Looking ahead, Christchurch Airport is focusing on reducing aircraft emissions, which pose a more substantial challenge. The airport is exploring the implementation of electric planes for short-haul flights and green hydrogen infrastructure for domestic and medium-haul international flights. Additionally, the airport is investigating the use of Sustainable Aviation Fuel (SAF) for long-haul flights. Christchurch Airport's commitment to sustainability and decarbonization not only sets an example for the aviation industry but also offers insights for other sectors aiming to improve their environmental impact.