Ryanair says it has submitted a competition complaint to the European Commission relating to its claim that staff at rival airlines are interfering in its talks with unions.
The airline has repeatedly claimed that workers at competing carriers were attempting to impede its negotiations with unions, with the resulting strikes damaging its business.
It said this was being done to "distort competition and customer choice for the benefit of legacy airlines" and called on Europe to investigate.
Earlier, Ryanair CEO Michael O’Leary met with Europe’s commissioner for Employment, Social Affairs, Skills and Labour Mobility; Marianne Thyssen to discuss its ongoing dispute with some unions.
In a statement following the meeting Ms Thyssen said that she reiterated to Mr O’Leary that EU rules made clear that workers were subject to employment law in the country that they were based – and not the country that the aircraft was registered in.
"Respecting EU law is not something over which workers should have to negotiate, nor is it something which can be done differently from country to country", she said.
"I made this very clear to Mr. O'Leary today. I am not against Ryanair or against the low-cost business model. But with great success also comes great responsibility.
"The internal market is not a jungle; it has clear rules on fair labour mobility and worker protection. This is not an academic debate, but about concrete social rights of worker."
Ryanair publishes offer to pilots and cabin crew
Meanwhile Ryanair has published the offers it has made to pilots and cabin crew across Europe relating to issues including rosters, promotions and transfers.
The airline said it was doing so to help progress negotiations and to "correct competitor trade union propaganda".
As part of Ryanair’s offer to pilots and cabin crew, the airline said it was committed to recognising and negotiating with national unions in the major EU countries in which it operates.
It said it would implement local employment contracts, while also offering more direct employment contracts to cabin crew.
The airline also committed to offering "world class training" and internal promotions in order to encourage staff to develop their careers within the airline.
Meanwhile Ryanair said it would also increase the amount of fixed pay it gave to staff.
Yesterday Ryanair pilots based in the Netherlands announced that they would join this Friday's cabin crew strike scheduled in Spain, Portugal, Italy and Belgium.
In a statement, the Dutch pilots' union VNV said that over the last ten months they had been trying to negotiate a Collective Labour Agreement with Ryanair management, but that these attempts had failed.
