Brussels Overflight: 40 Years of Conflict, 450,000 Affected Residents

The conflict in brief

Brussels Airport (Zaventem), located 12 km from the centre of Brussels, has been at the heart of a conflict spanning more than 40 years between the airport's economic interests (~85,000 jobs, EUR 5.4B in added value) and the quality of life of 670,600 Brussels residents exposed to aircraft noise.

The structural problem: prevailing winds (south-west, 70% of the time) require take-offs on runway 25R towards Brussels, overflying densely populated neighbourhoods. When the wind blows from the east, landings on runway 07L bring aircraft over the north-west of the city.

Controversial flight routes

Canal Route (runway 25R)

Departures following the axis of the Brussels canal, impacting the centre and north of the Region. This is historically the most-used route (54% of all movements).

Crucke Route / RNP-07L

The most controversial route. Activated in summer 2025 as a "temporary alternative procedure" during airport works, it uses satellite navigation (RNP — Required Navigation Performance) for straight-in approaches on runway 07L. Unlike previous curved approaches, it concentrates 100% of flights on the exact same corridor, amplifying the nuisance.

Key data:

• 96% of RNP-07L flights violate Brussels noise standards
• 64 violation reports issued in a single month (January 2026)
• 450,000 Brussels residents affected (estimate by the mayors' joint front)
• Route extended until 31 October 2026 (repeated extensions since summer 2025)

The federal minister describes the RNP-07L as a "purely alternative procedure" rather than a "preferential route". Critics note it is activated even in moderate easterly winds (4-6 knots).

Royal Castle of Laeken exclusion zone

Since 1954, a 1,500 m perimeter around the Royal Castle prohibits overflights. This prohibition, never challenged, forces flight paths to divert around Laeken — shifting the nuisance onto neighbouring municipalities. In 2024, the N-VA proposed lifting this exclusion during the Arizona negotiations; MR and Les Engagés refused.

Timeline of court convictions

The Belgian State has been convicted 5 times in 20 years over Brussels overflight:

Municipalities take action (March 2026)

Mayors' joint front (February 2026)

The mayors of Schaerbeek, Molenbeek and Koekelberg formed a joint front on 9 February 2026 to demand:

• An effective ban on night flights between 11 PM and 7 AM
• The rerouting of heavy freight away from Brussels
• Priority for flight paths avoiding residential areas

Legal proceedings

• Koekelberg (unanimous municipal council motion, 16 March 2026): first municipality to launch legal proceedings. Demands the immediate abolition of the RNP-07L, a strict night ban from 10 PM to 7 AM, compliance with Brussels noise standards, and structural consultations.
• Molenbeek joins the proceedings (19 March 2026).

Federal mediator crisis (March 2026)

Philippe Touwaide, federal airport mediator since 2001, was suspended for one month on 10 March 2026 by Minister Crucke.

Grounds:

• Conflict of interest: director of UBCNA (anti-noise association) from 2002 to 2015, while serving as mediator
• Conviction in June 2024 for harassment and defamation against the airport management (suspended sentence)
• New proceedings: the Brussels criminal court rules on 1 April 2026

The minister also announced a review of the mediator's status (contractual vs. statutory).

Sources: RTBF, Le Vif (March 2026).

Health impact (Superior Health Council, May 2024)

The SHC published a scientific opinion on the health effects of air traffic in May 2024. Findings:

• 160,000+ residents at increased health risk in Brussels
• Aircraft noise is more disruptive to sleep than road or rail noise at equivalent decibel levels
• Documented effects:
  • Sleep disorders
  • Cardiovascular diseases (hypertension, myocardial infarction)
  • Stress and depression
  • Reduced lung function
  • Learning difficulties in children
  • Pregnancy complications (reduced birth weight)
  • Increased risk of type 2 diabetes

SHC recommendation: ban on flights between 11 PM and 7 AM.

Fines: less than 20% collected

Of the ~EUR 32 million in fines issued by the Brussels Region:

• ~EUR 6M actually collected (less than 20%)
• EUR 10.8M definitively unpaid (abandoned)
• EUR 6.3M "unrecoverable" (but recoverable for 10 years)

This collection rate raises questions about the effectiveness of the regional sanctions system.

Balanced Approach procedure (EU)

On 26 January 2026, the Balanced Approach procedure (EU Regulation 598/2014) was launched, jointly led by the federal and Flemish governments. This mandatory procedure includes:

• A public consultation
• An opinion from the European Commission
• Assessment of 4 measures: noise reduction at source, land-use planning, operational procedures, operating restrictions

It was triggered by the annulment of the environmental permit in July 2025. Flanders must re-decide by June 2029.

Distribution of competences

This is an emblematic case of Belgian institutional complexity: the airport is in Flanders, noise is a Brussels regional competence, aviation is federal, and the municipalities bear the consequences.

Issues to watch

• Environmental impact study: to be submitted before 1 June 2026 (court order)
• Results of the impartial study on alternatives to the RNP-07L (commissioned by Crucke, results expected April 2026)
• Municipal actions: Koekelberg and Molenbeek in court; other municipalities may follow
• Balanced Approach procedure: public consultation + European Commission opinion (horizon 2029)
• Touwaide trial: verdict on 1 April 2026
• RNP-07L extension: currently until 31 October 2026 — will it be renewed?
• Night freight flights: 200 night-time cargo departures (Boeing 777, AeroLogic) in violation in 2025