Airplane fuel and gasoline are both similar in some ways since both consist of hydrocarbons. Also, the two products are gotten after the refinement of crude oil. However, one of the major differences between airplane fuel and gasoline is that they contain different types of hydrocarbons.
For instance, the total number of carbons in gasoline varies from 7 to 11. On the other hand, the total number of carbons in airplane fuel varies from 12 to 15. It is important to note that each carbon in the two products has hydrogen molecules attached to it. This tells you that airplane fuel is mostly kerosene.
Also, remember that airplanes travel through different temperatures and this can drop below 40°C. What this means is that gasoline would most like to freeze at this temperature, making kerosene the perfect fuel for airplanes, because it won't freeze. Another difference is that airplane fuel contains some additives that are absent in gasoline.