20% of flights departing Paris Charles de Gaulle (CDG) have been canceled beginning Thursday, December 5th, with about 13% of them being delayed.

Air France said to cancel 30 percent of its internal flights, while Ryanair and British Airways also said they had to make cancellations.

UPDATE: One fifth of flights in France to be hit by Thursday's strike action

The civil authority has asked airlines operating in France to reduce their number of scheduled flights by 20 percent on Thursday due to ground staff and air traffic controllers joining the mass walk-out.

Air France flights will be the most affected as it has 11 unions representing various workers in the company on strike beginning Thursday, Decemeber 5th.

The national carrier said 30 percent of internal flights in France will be cancelled as well as 15 percent of short to medium haul international flights.

Easyjet gave a statement to The Local on Wednesday morning confirming cancellations.

“As a result of the strike, easyJet has to cancel a proportion of its French programme and 233 flights, of which 70 are UK touching, have been cancelled. We are also expecting other flights to experience delays,” the statement read.

“Due to an increased volume of calls expected to the call centre, we advise customers travelling o December 5th to check the status of their flights on our Flight Tracker page or manage their bookings using our disruption portal on our mobile app or website at www.easyjet.com.

“Any customers affected by cancellations are eligible for a refund or a free of charge transfer to a new flight.