KEA
In terms of absolute values, the indicator has been improving both for KEA and the KEA corrected for the war in Ukraine (2.26% in 2023, 2.19% in 2024 and 2.15% for KEA; 2.13% in 2023, 2.04% in 2024 and 1.97% in 2025).
The values of the internal additional distance are relatively high (24th in ranking every year) but improving: 3.11 km per flight in 2023, 2.90 km per flight in 2024, 2.77 km per flight in 2025.
In terms of overall contribution to the additional distance in the SES area, Greece sits 22nd with 4.42%.
Regarding the assessment of the achieved level of actual performance in the environment KPA, the NSA reports: “The main reasons that affected performance in this key performance area are: 1) Activation of military areas 2) Adverse weather phenomena during the summer season 3) High levels of traffic above STATFOR Forecast.”
Regarding the implementation of major operational or structural changes during the calendar year impacting performance in this key performance area, the NSA reports: “During 2025 , CB FRA with Malta FRA and Nicosia FRA - Phase A (27 NOV 25)”
Regarding progress on the implementation of the measures committed to in the ERNIP, the NSA reports: “During 2025 , CB FRA with Malta FRA and Nicosia FRA - Phase A (27 NOV 25) - ERNIP proposals 112.031a , 112.036a”
Regarding the identification and analysis by the NSA of the underlying reasons or circumstances having led to the performance target not being achieved, the NSA reports: “Main reasons or circumstances having led to the performance target not being achieved : 1) The activation of military areas that reduced the availability of shorter routings 2) The higher-than-forecast demand suggests that dynamic airspace/sector configurations may not have been sufficient to fully accommodate the traffic increase while maintaining environmental performance. Restrictions in specific sectors force operators to file via longer routings. 3) Traffic growth significantly increased the complexity. 4) Weather events required tactical unexpected rerouting of traffic, resulting in longer flight trajectories. The combined effect of military activity, weather disruptions, and traffic growth may have limited the availability of optimal routes and direct routings, reducing the ANSP's ability to achieve the planned KEA target.”
Regarding recommendations to the ANSP to rectify the situation, the NSA reports: “Conduct periodic analyses of the environmental impact of military area activations
and weather-related reroutings and identify mitigation measures in cooperation with relevant stakeholders.”
Regarding remedial measures that have been / will be taken by the ANSP to rectify the situation, the NSA reports: “Τhe ANSP has already implemented measures aimed at improving environmental performance, including:
strengthening civil-military coordination arrangements to maximise the availability and flexible use of airspace and to minimise the duration and impact of military area activations; and
increasing the use of dynamic airspace management, conditional routes and direct routings whenever operationally feasible.
These measures are subject to continuous assessment and monitoring by both the ANSP and the NSA to evaluate their effectiveness and to identify further opportunities for improvement in flight efficiency performance.”
KEP
Regarding initiatives implemented or planned that will improve this PI and how does the NSA intend on monitoring their effectiveness on performance, the NSA reports: “PBN procedures for 31 airports are planned for the forthcoming year, cross border FRA with Cyprus has been implmented in 2025.”
KES
Regarding initiatives implemented or planned that will improve this PI and how does the NSA intend on monitoring their effectiveness on performance, the NSA reports: “PBN procedures for 31 airports are planned for the forthcoming year, cross border FRA with Cyprus has been implmented in 2025.”
Vertical flight efficiency
Regarding initiatives implemented or planned that will improve this PI and how does the NSA intend on monitoring their effectiveness on performance, the NSA reports: “The ANSP has implemented measures aimed at improving the vertical flight efficiency of actual en-route trajectories, including the application of Flexible Use of Airspace (FUA) principles, enhanced civil-military coordination, and operational procedures designed to minimise unnecessary level-offs and flight level changes. Moreover, within the framework of the ATHENIAN Project, which includes the redesign of the terminal airspace (TMA) and the implementation of new Performance-Based Navigation (PBN) procedures, dedicated arrival and departure routes are planned to be developed in order to improve traffic flows and enhance flight efficiency. Furthermore, as part of the national plan for the implementation of PBN procedures at all Greek airports by 2030, the ANSP will examine the development of routes designed to facilitate uninterrupted climb and descent operations, thereby reducing the need for level-offs and contributing to improved vertical flight efficiency.
These measures are continuously monitored and assessed by the ANSP to evaluate their effectiveness and identify opportunities for further optimisation. The NSA conducts regular oversight through the review of performance data, annual performance reports, and dedicated performance meetings with the ANSP.”