With staff halting work to protest against employment conditions, the airline has limited many short-haul flights to just 100 passengers so that the number of crew on board meets safety requirements. As a result people have been turned away for flights that are taking off half empty.
On Sunday the airline cancelled one in five flights, including nine long haul flights, due to the industrial action. One of the areas of dispute between the carrier and labour representatives is a plan to cut staffing levels for longer flights.
The disruption comes at a traditionally busy time of year for air travel. French schools are on their mid-term break and with Tuesday a public holiday, many French workers take Monday off as well.
Government transport minister Nathalie Kosciusko-Morizet criticised the unions for the strike action, primarily over the timing. “This is not the best moment,” she told Europe 1 radio.
The unions say they plan to continue the strike until Wednesday.