Efficient, economic and environmentally friendly aircrafts and their operations have become the moti- vation of research nowadays after the COVID-19 pandemic has spread around the world. This paper presents a combined solid oxide fuel cell with a turbofan engine system in order to potentially improve the aviation performance. Two different analyses are conducted through exergy and exergoeconomic approaches. Also, the paper investigates five alternative fuels with five fuel blends on the system per- formance. It is founded that the overall exergetic performance is almost the same among the five fuel blends of 82% exergetic efficiency and 18% exergy destruction ratio. In addition, using the methanol and hydrogen fuel blend appears to be the most economical way of achieving a relative cost difference of 38% and minimum price of electricity generation in the range of 108e621 $/GJ for turbines and SOFC. However, using the dimethyl ether and hydrogen fuel blend is the least favorable.