Are Lingus is to sue trade union SIPTU over its planned industrial action, which was struck down in the High Court on Wednesday.
The four-hour strike, which was planned to commence today, was blocked on Wednesday when the High Court issued an injunction to the Dublin Airport Authority restraining SIPTU from carrying out the stoppage.
In proceedings issued today, Aer Lingus is seeking "millions" worth of damages under a number of headings, including breach of contract and conspiracy.
It also claims that SIPTU has unlawfully interfered with the airline's trade or business.
The proposed action was part of an on-going row about cuts to pension benefits at Aer Lingus and the DAA.
A SIPTU spokesperson said the union will be consulting with its legal advisors over the next number of days.
