Air France on Saturday cancelled around 20% of its flights on the fourth day of a strike by flight attendants during the peak summer travel season, the airline said, reports The Bangkok Post.
The French carrier said it expected around the same level of service on Sunday with some 80% of flights still scheduled.
However, "last minute cancellations and delays cannot be ruled out," the airline added in a statement.
"Difficulties with the composition of the crews could also lead to limits on the number of passengers per flight," it said.
For security reasons there must be one flight attendant for every 50 passengers on board.
On Friday the airline cancelled a flight to New Delhi at the last minute because of a lack of personnel.
Unions representing around half of the strikers called the stoppage, which began Wednesday, after marathon talks failed to reach a breakthrough on renewing a collective labour accord on rules, pay and promotions that expires in October.