A350 testbed demos ‘most energy efficient flight’ in advance of 4D

When the widebody landed at its destination — Munich International Airport — precisely on time and with its eco-goals achieved, the power of air traffic management (ATM) optimization to slash fuel burn and CO2 emissions was apparent.

 https://runwaygirlnetwork.com/2022/12/a350-testbed-most-energy-efficient-flight/