Widespread disruption is being threatened due to a nationwide strike by French air traffic controllers and civil servants on Thursday.
The walkout in protest against government civil service reforms is likely to lead to flight delays and cancellations during the day and immediately after the action, according to local reports.
Passengers due to fly via airports in France are being advised to monitor the situation.
EasyJet tweeted: “We are aware of a national strike taking place in France on Thursday, May 9.
“For the latest updates and info, please check our flight tracker.”
Air France regional arm Hop said: “Following a national call for strike action in France on Thursday 9 May, the DGAC (French Civil Aviation Authority) has requested airlines to reduce their flight program to and from Paris-Orly, Lyon, Marseilles and Toulouse airports mainly.
“We apologise again for any inconvenience this industrial movement may have caused you during this period.”
