A malfunction at the Paris Orly Airport control tower on Sunday led to the cancellation of roughly 130 flights, disrupting travel plans for thousands of passengers. According to Aeroports de Paris, around 40% of the day’s total flights—both departures and arrivals—were called off.

France’s civil aviation authority, DGAC, attributed the disruption to a failure in the air traffic control systems at the Orly tower, calling it a “significant” issue. An aviation source revealed that the chaos was due to a radar malfunction.

Half of the cancelled flights were outbound, with the rest incoming. Routes affected included domestic French destinations, other European cities, and North Africa. The DGAC did not confirm if operations would resume normally by Monday.

Among the stranded passengers was 46-year-old Agnes Zilouri, who was trying to fly to Oujda, Morocco, with her elderly mother and young son to attend a funeral. "The flight is cancelled. Fortunately, I am with my mother," she said.

Orly Airport, which handled around 33 million passengers last year, is France’s second busiest airport after Charles de Gaulle.