The aviation industry is facing increasing pressure to decarbonize, with a focus on reducing emissions and transitioning to cleaner fuels. In this context, sustainable aviation fuel, electricity, and hydrogen propulsion are being considered as key alternatives to conventional jet fuel. However, these options are expected to enter the commercial marketplace at different stages based on factors like feedstock type, technical processes, and overall readiness. The adoption of these sustainable fuels will vary for aircraft of different sizes and capabilities, with larger planes likely adopting these technologies sooner than smaller ones. The industry is looking towards a mix of sustainable fuels to drive the decarbonization process forward, emphasizing the importance of a diversified approach to reducing emissions and achieving environmental goals.