Network Operations Report – December 2017

16 January 2018

Traffic in December 2017 increased by 1.9% compared to December 2016, a slowdown in growth due to high traffic levels in December 2016 and also explained by recent airline failures. Traffic has shown continuous growth since November 2015. Five states each added daily more than 50 flights to the network with Spain, Turkey and Poland as the top contributors.

With the winter traffic level, total ATFM delays decreased by 22.3% in December 2017 compared to December 2016. En-route ATFM delays increased by 4.7%; airport ATFM delays decreased by 28.8%.

Highlights include:


  • Italian ATC industrial action on Friday 15 December generated 6,265 min of airport ATFM delay in Italy. NM estimates there were 285 fewer flights during the action;
  • En-route ATC staffing and ATC capacity issues in Karlsruhe and Warsaw ACCs;
  • Canarias ACC ATFM delay per flight decreased by 22% with 8.8% traffic growth; 


  • Seasonal weather impacted operations at the majority of north-west Europe airports. Amsterdam/Schiphol and London airports were strongly impacted;
  • There were capacity issues at Istanbul/Atatürk, Frankfurt and Amsterdam/Schiphol airports;
  • Tower/taxiway maintenance in conjunction with airport capacity at Paris/Orly airport;

The average en-route ATFM delay per flight in the NM areai in December was 0.28 min/flt, which is below the corresponding monthly guidelineii value of 0.32 min/flt. The average YTD en-route ATFM delay per flight in 2017 in the NM areais 0.88 min/flt, which is above the network target 0.50 min/flt. This is a similar level to 2016 but with 4.4% more traffic handled.

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 See Notice on page 4 of the Overview document for more information on NM Area .
ii NM’s calculation that provides the guideline en-route delay (min) requirements to achieve the annual target (0.5 min/flight).

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