Biojet fuel innovations are crucial for reducing CO2 emissions in the aviation industry. Traditional jet fuel produces a lot of greenhouse gases, but biojet fuels are seen as a more sustainable and less polluting alternative. The most popular method for producing biofuel is hydrogenated esters and fatty acids (HEFA). Second-generation biofuels, like those made from jatropha, are environmentally friendly and technologically advanced. The main obstacles to replacing conventional fuel are the price of feedstock and the lack of bio-jet fuel availability. Further research on optimal feedstocks is needed to improve energy quality and quantity. Biomass jet fuel has the potential to replace traditional jet fuel for both commercial and military aircraft.