The cause of the disruption is a planned strike by French air traffic controllers. They are unhappy with proposed changes to their work schedules and are demanding higher salaries.

The strike is expected to have a significant impact on air travel. Up to 70% of flights at major French airports could be cancelled, leading to long delays and frustration for travelers.

French media is calling the strike a "journée noir" or "black day" for French airports. Travelers are advised to expect major disruption and to check with their airlines for the latest information.

The strike is the culmination of a 15-month long dispute between air traffic controllers and air navigation service authorities. Unions are unhappy with plans to overhaul work schedules to cope with increased air traffic.

Unions are demanding a salary increase of 5% per year for the next three years, as well as a doubling of their special qualification allowance. They are also calling for an increase in staff numbers.

The strike comes despite an agreement to suspend industrial action until after the Paris Olympics. This agreement, known as the "Olympic truce," was intended to avoid disruptions during the Games.

Another union representing metro and bus workers has also announced a potential strike notice that could disrupt transportation during the Olympics. However, the French government has recently passed a bill that allows them to restrict transportation strikes during major events.

If you are traveling to or from France on Thursday, April 25th, be sure to check your flight status with your airline as soon as possible. You may need to rebook your flight or make alternative travel arrangements.

The situation is still developing, so it is important to stay informed about the latest updates. You can check with your airline, the French civil aviation authority, or news outlets for the most recent information.