Passengers intending to fly in and out of France this evening and tomorrow may face flight delays as air traffic controllers join a national public sector strike.
Ryanair has posted details of affected flights on its website, and warned that further flight delays and cancellations are likely.
The airline apologised to its customers for any inconvenience caused by what it called "these unjustified air-traffic control disruptions which are entirely outside of our control".
Aer Lingus said no flights would be affected today, and it will post information about tomorrow's affected flights on its website this evening.
Intending passengers are urged to check their airline's website before travelling to the airport.