Fuel efficiency has long been a central focus of airline operations. New aircraft, more efficient engines, optimized flight planning, routing, and procedures such as single-engine taxiing have steadily reduced fuel consumption. As these measures become increasingly refined, airlines are now turning their attention to the next layer of efficiency: using better data and more precise operational control to reduce fuel burn across the entire flight operation.
From efficiency measures to operational control
Many of the traditional measures remain important. Optimized routes and speeds, efficient climb and descent profiles, reduced-engine taxiing, and more accurate fuel planning can all reduce fuel consumption when operational conditions allow.
What is changing is how these measures are connected. Rather than treating fuel efficiency as a collection of individual initiatives, airlines are increasingly using operational data to identify where improvements are possible and assess whether they deliver measurable results.
IATA’s FuelIS platform reflects this development. It uses actual operational data from more than 215 airlines to benchmark fuel efficiency by aircraft type, region, airport, and other parameters. The objective is to give airlines a clearer picture of where they stand against industry performance and where further savings may be possible.
This is becoming more important as efficiency is slowing down. IATA notes that airlines are increasingly dependent on accurate, validated fuel data to identify incremental savings and establish realistic performance targets. Fuel efficiency is consequently moving from an isolated operational issue towards a broader management discipline.
The importance of marginal gains
The remaining opportunities are often relatively small. An inefficient descent, additional holding, an unnecessarily large fuel uplift or a sub-optimal flight path may have little impact on an individual sector. Across thousands of flights, however, these differences can become significant.
KLM provides an example of how airlines are trying to address this at cockpit level. Its Fuel Efficiency Team, established around a decade ago, uses operational data and software to identify opportunities to optimize flight paths, speeds, and alternative airports. Pilots can compare their flight data with previous operations on the same route and use this information to identify potential improvements.
The approach demonstrates the value of feedback. Instead of simply instructing crews to fly more efficiently, airlines can increasingly show where efficiency is being lost and what effect a different operational decision could have.
Better data, better decisions
Digitalization is also changing processes outside the cockpit. easyJet is introducing a digital fuel-ordering system that connects pilots, fuel suppliers, and operational teams. Its eHandshake platform records fuel planning, ordering, delivery, and acceptance digitally, replacing a process that previously relied partly on paperwork and manual data entry.
The system is intended to improve the accuracy and visibility of fuel management and reduce unnecessary fuel uplift. easyJet estimates that the initiative could save around 10,000 tons of CO2 annually.
The significance goes beyond the potential fuel saving itself. By creating a single digital record, airlines gain better control over what fuel was planned, requested, delivered, and accepted. That information can then be used to identify discrepancies and improve future decisions.
Connecting the operation
Other airlines are applying the same principle on a broader scale. Lufthansa Group’s OPS Sustainability program covers cockpit, cabin, ground operations, maintenance and cargo. Since 2022, more than 90 measures have saved around 54,000 tons of fuel, according to the group.
The next stage is increasingly data-driven. Its OPSD Operations Decision Support Suite, developed with Google Cloud, uses historical data, current operational information and forecasts to support decisions such as selecting the most efficient aircraft for a particular route. The group is also developing digital applications to make fuel planning more precise.
The example illustrates where the industry is heading: fuel efficiency is no longer confined to the flight itself. Aircraft assignment, route planning, payload, fuel supply, air traffic conditions, and cockpit decisions are increasingly being viewed as interconnected elements of one operation.
Precision becomes the advantage
This approach does not mean that every flight can simply be operated with less fuel. Safety margins, weather, traffic, diversion requirements, and other operational factors remain fundamental. The objective is to determine more precisely what is required under the conditions of each individual flight.
That distinction is important. The next generation of efficiency is unlikely to come from one single measure capable of transforming airline fuel consumption. Instead, it will come from the accumulation of marginal improvements: a more accurate fuel uplift here, a better route there, a shorter taxi time or a more efficient aircraft assignment.
For airlines, this makes data quality and operational visibility increasingly valuable. The ability to compare actual performance, identify deviations and feed the findings back into daily operations can turn small efficiency gains into a meaningful overall result.
New aircraft, more efficient engines, and sustainable aviation fuels will remain central to aviation’s long-term decarbonization. But these solutions require substantial investment and, in many cases, years before they can be deployed at scale.
