Easyjet has said it will file a formal complaint to the European Commission about strikes by air traffic controllers (ATC) in France, which it says has cost it £25 million.
The low-cost carrier had to cancel more than 2,600 flights over the three months to 30 June.
CEO Johan Lundgren says the industrial action could breach EU law and that citizens’ freedom of movement was being restricted due to a lack of protection for flights in French airspace.
Easyjet’s announcement follows a similar complaint lodged by Ryanair and British Airways owner International Airlines Group (IAG), with IAG chief Willie Walsh saying French ATC strikes are the ‘biggest threat’ to the airline industry at this year's GTMC Overseas Conference.
The carrier estimates that costs for the year could rise 3 per cent as a result of the disruption.
Despite the cost of the strikes, the airline has revised its full-year profit outlook due to ‘strong demand’, saying it could take as much as £590 million.