When traffic demand is anticipated to exceed the declared ATM capacity, ATC units may call for “ATFM regulations”. Aircraft subject to ATFM regulations are held at the departure airport according to “ATFM slots” allocated by the Network Manager.

The resulting ATFM delays of a flight is allocated to the most constraining ATC unit, either en-route (en-route ATFM delay) or departure/arrival airport (airport ATFM delay).

The overview below shows an analysis of ATFM delays and the delay cause as attributed by the local Flow Management Position (FMP) in the EUROCONTROL area.

The underlying data is available for download in the data section.