PARIS — A major French air traffic control (ATC) strike is underway, causing widespread disruption across France and affecting air travel throughout Europe. The industrial action, taking place on July 3 and 4, 2025, coincides with the start of the French school summer holidays, one of the busiest travel periods of the year.

The strike is led by the UNSA-ICNA union, France’s second-largest ATC union, and is supported by USAC-CGT, another key union. The protest centers on demands for better pay, increased staffing, and improved management practices. Notably, the country’s largest ATC union, SNCTA, is not participating in this strike, which may help contain some of the disruption.

However, significant delays and cancellations are expected, not only at French airports but also for flights merely passing through French airspace.

Flight Reductions Ordered by DGAC

The French Civil Aviation Authority (DGAC) has ordered the following flight reductions:

• Paris Airports:
  • Charles de Gaulle (CDG), Paris Orly ((ORY), Beauvais–Tillé (BVA): 25% of flights cancelled
• Southern and Island Airports:
  • Nice (NCE), Bastia (BIA), Calvi (CLY): 50% of flights cancelled
• Regional Airports:
  • Lyon (LYS), Marseille (MRS), Montpellier (MPL), Ajaccio (AJA), Figari (FSC): 30% of flights cancelled

Impact on Travelers

The disruption is expected to ripple across the European network, with flight schedules impacted even for routes not directly affected by the cancellations. Delays may cascade throughout the day due to aircraft repositioning and congested airspace.

Authorities advise travelers to:

• Check flight status directly with airlines before heading to the airport.
• Monitor for real-time updates from airports and operators.
• Consider changing travel dates if possible to avoid peak disruption.
• Know your rights: Airlines are required to offer either a refund or alternative routing if your flight is cancelled. However, compensation for delays is typically not granted in the case of ATC strikes, which are classified as "extraordinary circumstances."

Both the UK Foreign Office and French aviation authorities have issued travel advisories, urging passengers to stay informed via the media and their airlines.

Background, Outlook

This strike is part of a series of recurring ATC labor actions that have disrupted European air travel over the past two years. French air traffic controllers have staged multiple strikes since 2023 over long-standing grievances related to pay, staffing shortages, and working conditions.

While the most significant disruption is expected on July 3, only one of the striking unions is set to continue the action on July 4, which may lead to a partial easing of the situation. Nonetheless, overflights—flights crossing French airspace without landing—may still face rerouting and delays as airspace capacity is reduced.