DDR2 web portal

Demand data repository web portal

We provide our air traffic management stakeholders with the most accurate picture of the pan-European air traffic demand.

Log in Access conditions
Planned release in 2019 - 2.9.7

Release 2.9.7 is planned for the second semester of 2019. It will mainly focus on communication between local tools and DDR2 users account in order to implement proper access restriction.

EUROCONTROL, as Network Manager (NM), provides air traffic management (ATM) actors with the most accurate picture of past and future pan-European air traffic demand (from several years ahead until the day before operations), as well as environment data, analysis reports and tools that can read and process the data.

All this information is managed by DDR service, a EUROCONTROL cross-unit activity, gathering the best expertise, which can be accessed from the Demand Data Repository 2 “DDR2” web portal. Access to the DDR2 web portal is restricted (see access condition below).

DDR future traffic can be forecast thanks to the knowledge of past traffic and several thousands of flight intentions provided by airlines and airports that are collected, stored, analysed and treated on a daily basis.

DDR traffic forecast supports strategic, seasonal and pre-tactical planning, and also special events or major ATM evolution projects.

Finally, DDR provides a refined analysis of past demand to facilitate post-operations analysis and to identify best practices for future operations.


This tool gives access to:

  • Past traffic data - from August 2012 till now, traffic demand, last filed flight plan traffic trajectories as well as actual trajectories are provided for past analysis;
  • Past and Pre-OPS (one AIRAC in advance) environment data - they can be downloaded and are used internally for processing future traffic trajectories. They contain all information necessary to analyse and process sector loads, capacity bottlenecks, re-routing options, etc;
  • Strategic traffic forecast - this covers the planning phase, from 18 months to 7 days before operations. It is used for medium- to-short-term capacity planning and seasonal planning. Users can themselves generate, with several 4D trajectory processing options, and download this type of forecast directly via the DDR2 web portal;
  • Pre-tactical traffic forecast - it focusses on the planning phase, from 6 days to 1 day before operations. Network pre-tactical planning is supported by the NM PREDICT system and can be accessed via the DDR2 portal;
  • NEST and SAAM tools - they can be downloaded from DDR2 Web portal and are compatible with DDR data. These tools analyse and process a great deal of information for the purpose of facilitating airspace design and capacity planning in Europe.


The DDR addresses the needs of a wide range of users such as:

  • air navigation service providers (ANSPs), who use it to prepare and optimise their capacity plans;
  • airlines, who rely on it to detect flight efficiency improvement opportunities, by visualising and comparing flight plan trajectories for any period of time in the past;
  • airspace management actors, for airspace management and coordination of the available airspace;
  • airports, with the aim of integrating their local plans with the Network Operations Plan;
  • the NM at central/FAB/local level.

Access conditions

Access to the DDR2 web portal is restricted to air navigation service providers (ANSPs) and airline operators (AOs) within Europe, on the basis of approval of a licence agreement and formal acceptance by EUROCONTROL. Airlines are allowed to download (historical or forecast) traffic data for their own fleets only.

As of June 2019, we no longer provide access to the DDR2 web portal to students.

Request access

To access the portal:

  1. Register to OneSky Online
    You can register to OneSky Online in a few minutes and this will allow you to access this and many other EUROCONTROL tools.
  2. Subscribe to the database
    Once you have registered, log in, and click on the 'Manage' button at the bottom right-hand side of your screen. The page which comes up will allow you to manage the tools you are subscribed to. Find the database in the list, click on it, provide a business justification for requesting access and click on 'Subscribe'.
  3. Confirmation
    Your request will be vetted and you will receive confirmation that you can now access the tool. The time this takes depends on the team in charge and the process applied. When you have received confirmation, log in to OneSky Online, click on the tool in your list of services and enjoy.

Register to OneSky Online

Note for users

The DDR2 web portal download and generation operations are subject to counters, which limits the number of weekly operations per user. Access to the tool cannot be shared.


If you experience problems accessing or using the tool, please contact us by using the contact page on our pages.