The article discusses the challenge of decarbonising long-haul flights by 2050, highlighting the disproportionate carbon emissions from a small percentage of departures. While electric and hydrogen aircraft are progressing for short-haul travel, they are deemed unviable for long-haul operations. The focus is on sustainable aviation fuels (SAF) and fleet renewal as key strategies to reduce emissions. The FlyingGreen platform's FuellingDecarb module analyzes the feasibility of producing sufficient SAF to meet decarbonisation targets. The article suggests centralising SAF supplies at key airports with long-haul traffic to improve efficiency and environmental benefits. Additionally, replacing older aircraft with newer, fuel-efficient models could reduce carbon emissions by 10% and lessen SAF requirements. Synergies with other transport sectors are seen as crucial for expediting SAF production. The overall sentiment of the article is positive, emphasizing the potential for achieving net zero goals through a combination of sustainable aviation fuel, green energy expansion, and fleet renewal.