Low cost airline Ryanair has cancelled more than 170 flights because of French air traffic control strikes, affecting more than 30,000 passengers.
The Irish carrier said the cancellations on Thursday and Friday impact flights to and from France, but will also affect French overflights.
Ryanair chief executive Michael O'Leary renewed calls on EU Commission President, Ursula von der Leyen, to take “urgent action” to reform European Union air traffic control (ATC) services in light of the disruption.
Mr O'Leary said: “Once again, European families are held to ransom by French air traffic controllers going on strike.
“It is not acceptable that overflights over French airspace en route to their destination are being cancelled/delayed as a result of yet another French ATC strike.
“It makes no sense and is abundantly unfair on EU passengers and families going on holidays."
Ryanair has long-campaigned for an overhaul of ATC services across Europe.
It wants the EU to ensure ATC services are fully staffed for the first wave of daily departures, as well as to protect overflights during national ATC strikes.
“These two splendid reforms would eliminate 90% of all ATC delays and cancellations, and protect EU passengers from these repeated and avoidable ATC disruptions due to yet another French ATC strike,” Mr O'Leary added.
It comes after Ryanair revealed it cancelled more than 800 flights in June due to the conflict in the Middle East.
The airliner is among those to have cancelled and rerouted flights amid the conflict between Israel and Iran, as well as continued attacks in Gaza.
Last week, flights were halted at Dubai airport in the United Arab Emirates (UAE) as passengers were told to expect further delays and cancellations.
On Wednesday, Ryanair said it still operated more than 109,000 flights in total in June, indicating that fewer than 1% of flights were affected.
The Ireland-based business said it carried 19.9 million passengers over the month, representing a 3% increase on the same month last year.
It said this means it has carried 202.6 million passengers over the past 12 months, up 7% year-on-year.
