This is the notice currently posted on the Airports of Paris Web site, regarding flights at all three Paris-area airports starting tomorrow:
Due to French Civil Aviation Authority strike from Tuesday 11 to Thursday 13 June: 50% of flights cancelled. Contact your airline for more information.
That indicates that a major mess is brewing not only for air travel to and from France, but from the spillover in Europe and beyond. The cancellations are because of protests planned by air traffic controllers objecting to centralized control of air space in Europe.
The strikes may spread to other countries on Wednesday.
So plan ahead, of course.