ATC System Failure Sees Flights Reduced by 40% at Paris Orly Airport

On May 18, 2025, Paris Orly Airport (ORY), one of France’s busiest travel hubs, descended into chaos due to a critical air traffic control (ATC) system failure.

The outage, which struck the airport’s control tower in the early afternoon, grounded aircraft, cancelled flights, and left thousands of passengers stranded.

This incident, reported by the French Civil Aviation Authority (DGAC), highlights ongoing concerns about the reliability of air traffic infrastructure as summer travel ramps up.

40% Reduction in Flights

The DGAC confirmed that the technical glitch forced a 40% reduction in flight schedules for the day. Airlines like easyJet, Vueling, and others operating both domestic and international routes were affected.

This saw cancellations of international flights to destinations like the US, Italy, Germany, Saudi Arabia, and Ireland.

Passengers faced long queues, rebooking nightmares, and sparse updates from airlines. Social media posts from Paris Orly Airport have warned of delays spilling into Monday May 19.

Full Restoration of Operations Unclear

Technical teams worked urgently to restore operations, but the DGAC provided no clear timeline for recovery or details on the outage’s cause.

This lack of transparency frustrated travellers, many of whom voiced their anger online. One social media post described the scene as “utter chaos,” with families struggling to find alternative flights.

The ripple effects disrupted travel plans across Europe and beyond, as Orly handles millions of passengers annually.

Previous IT Failure at Paris Orly

This isn’t Orly’s first brush with ATC trouble. A 2019 IT failure caused similar havoc, and 2024 saw strikes cripple up to 70% of flights.

These recurring issues raise questions about the airport’s preparedness for peak travel seasons. With summer 2025 approaching, the timing couldn’t be worse. Orly’s role as a key gateway for tourists and business travellers amplifies the concern over the outage.

For now, authorities are urging passengers to check with airlines for real-time updates. The DGAC advises travellers to expect residual delays on May 19, though the full extent remains unclear.

As investigations into the outage continue, the incident serves as a stark reminder of the fragility of air travel systems. The issue of aging IT systems and related equipment has been a key problem globally in the post-pandemic era.

Airports and airlines must prioritize robust infrastructure to prevent such disruptions from becoming the norm.

Travelers planning to fly through Orly should stay proactive. Monitor flight statuses, arrive early, and prepare for potential delays. Until Orly’s ATC systems are fully restored, patience and flexibility will be key to navigating this period of disruption.