What is the most energy efficient plane?

As of now, the most energy-efficient passenger aircraft is often considered to be the Airbus A220, known for its advanced aerodynamics and fuel-efficient engines, which significantly reduce fuel consumption per seat. Among cargo planes, the Boeing 787 Dreamliner is also recognized for its efficiency due to lightweight materials and advanced engine technology. Innovations in electric and hybrid aircraft are emerging, but they are still in developmental stages compared to conventional models. Overall, ongoing advancements in aviation technology continue to improve energy efficiency across various aircraft.