Network Operations Report – May 2017

15 June 2017

Traffic in May 2017 increased by 4.6% compared to May 2016 and was in line with the high forecast. Traffic has shown continuous growth since November 2015. Thirteen states contributed most to the European local traffici growth, with Spain, UK and Portugal as the top contributors. Strong growth is expected to continue into the summer.

Total ATFM delays decreased by 17.9% in May 2017 compared to May 2016. En-route ATFM delays decreased by 16.6% but, note that en-route ATFM delays were relatively high in May 2016 due to industrial action in France. Airport ATFM delays decreased by 19.8%.

Highlights include:


  • Delay in Maastricht ACC due to training or implementation of new sector configuration for Brussels East and trials of New Voice Control System (NVCS);
  • Romanian ATC industrial action on 12 and on 30 May generated delays for Bucharest ACC;
  • Greek ATC industrial action on 17 May resulted in delays for several ACCs;
  • En-route weather impacted several ACCs, especially Maastricht ACC;
  • En-route ATC capacity issues in Maastricht, Karlsruhe, Brest, Bordeaux, Marseille and Barcelona ACCs;


  • A-CDM implementation at Palma de Mallorca airport;
  • Advanced ATC Tower implementation at Tenerife/South airport;
  • Seasonal weather impacted several airports, especially Frankfurt airport, and to a lesser extent Zurich, London/Heathrow and Munich airports;
  • Capacity issue at Amsterdam/Schiphol airport due mainly to high demand.

The average en-route ATFM delay per flight in the NM areaii in May was 0.70 min/flt, which is above the corresponding monthly guidelineiii value of 0.48 min/flt. The average YTD en-route ATFM delay per flight in 2017 in the NM areaii is 0.46 min/flt, which is above the corresponding guideline value of 0.31 min/flt. A quarter of en-route delays this year are due to disruptions, such as industrial action.

The monthly Network Operations Report overview provides a high level view of the performance of the European ATM network, whilst the analysis provides a detailed view. Download previous network performance reports.


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i Internals, international departures and arrivals, excluding overflights.
ii See notice on page 4 for more information about NM area
iii NM’s calculation that provides the guideline en-route delay (min) requirements to achieve the annual target (0.5 min/flight).

Network Manager Operational Performance team

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