A week-long strike by Air France pilots is set to lead to wholesale disruption and cancellations.
The carrier estimates it will only be able to operate 40% of its flights on Monday as the seven-day protest kicks off.
The airliner has warned the walk-out could cost the company between 10-15 million euros a day.
Air France earlier announced plans to restructure the airliner to compete with European low cost operators.
The proposal would see them open up more bases under their Transavia brand. But unions want the pilots to have the same contractual terms for flying with Transavia, as they do with Air France, something the company has so far refused to agree to.