Ahead of the planned walkout on Tuesday (6 June), Lo Bue-Said said the strike was of "particular concern as we start to approach the key summer holiday period" with the "vast majority" of ex-UK flights to the continent required to travel through French airspace.

Last week, Ryanair chief executive Michael O’Leary said France should sacrifice its own domestic and short-haul connectivity to protect overflights, and renewed his call for the EU to place more pressure on France to guarantee smooth operation of overflights.

“Protect 100% of overflights and if there have to be flight cancellations, cancel the French domestic and short-haul flights,” said O’Leary. “We’re being forced to cancel flights – passengers and their families are losing their summer holidays."

Lo Bue-Said said: "We very much hope the issues with French ATC do not have impact those travelling. Our advice to those planning to travel over these strike days is to speak with their travel agent or check their flight status online before travelling to the airport.

"When it comes to booking holidays, we always advise booking with a travel agent as they are best placed to support customers throughout their trip from the point of booking to their return. Agents have an incredible amount of knowledge and experience in helping with travel disruption."

She added: "The industry has proved itself capable of putting robust contingency measures in place when necessary and we’re looking forward to people travelling this summer with minimal disruption.”

The strike got under way at 6pm on Monday (5 June) and is likely to run until 6am on Wednesday (7 June).