French carrier Air France announced strike action starting as of today and continuing until september 22nd 2014. If you are travelling with Air France please check this link and/or talk to your travel agent if your flight will be affected.
Flights AF4600 / AF4602 and AF4602 from Paris are operated by Luxair (LG8012 - 8014 -8020) and should not be affected by the actions - however we recommend to check upfront.
Should air transport be disrupted between Paris and Luxembourg, the high speed train TGV could be an option linking "Gare de l'Est" in Paris to Luxembourg in 2 hours. 
However it appears that the RER-B line linking CDG-Airport to Gare the l'Est is under construction until Friday 19th causing further perturbations.