France's civil aviation authority the DGAC announced on Monday afternoon that it had asked airlines to reduce their flights to and from Paris Orly airport by 20 percent on Tuesday. The DGAC said that because of strike notices lodged by air traffic control unions it had asked airlines to cancel flights to and from Orly on Tuesday December 17th. Air traffic controllers and airport ground staff joined the anti-pension reform strikes on both December 5th and December 10th. On both those days around one fifth of flights to and from all of France's biggest airports had to be cancelled. Air France was forced to cancel around 30 percent of internal and short-haul international flights with airlines such as Easyjet and Ryanair also having to ground scores of flights to and from France.

Source: The Local December 16, 2019 16:18 UTC