Airbus plans a new narrow body single aisle aircraft targetting around 20-30% fuel efficiency improvement over current models. . The aircraft is expected to enter production in the 2030s. Moreover, the aircraft would be 100% Sustainable Aviation Fuel (SAF) compatible.

Key enablers of fuel efficiency improvement include new open fan (Prop fan) engines, foldable wings, hybrid power systems including batteries for taxing and other use cases, and better materials. A propfan engine is something between a Turboprop engine and a Turbofan engine. Propfan engines have been prototyped around late 1970s. However, most of the research were unfruited due to excessive noise from these engines. A similar foldable wing design was launched by boeing in 2013 called 777X, these designs not only increase the wingspan improving efficiency, but also allows larger aircrafts (Code F) to land on smaller airports (Code E). Most of these technologies are in very nascent stage, and to achieve the said fuel efficiency requires all of these  technology to mature much earlier than the claimed timeframe.