Aer Lingus staff will stage a two-hour work stoppage as a pension dispute escalates, unions have confirmed.
The airline will be served with notice of the industrial action, which will happen from 10am to noon on Monday November 19.
Cabin crew and ground, clerical and administration staff will take part in the stoppage.
Four trade unions - Siptu, Unite, TEEU and Mandate - said any disruption to passengers would be solely due to the decision of Aer Lingus to stop talking to staff representatives about their future retirement incomes.
"There will be no disruption on November 19 if Aer Lingus management agrees to re-enter the negotiations and attend hearings at the Labour Court," they said.
Aer Lingus said it would not attend the Labour Court, but it remains available for negotiations through the Labour Relations Commission (LRC).
The dispute centres on the Irish Airlines Superannuation Scheme (IASS), a pension pot for Aer Lingus and Dublin Airport Authority (DAA) staff that is in deficit by almost 750 million euro.
Travel chaos at the country's main airports was averted last month when unions and management at both firms agreed to enter talks.
But industrial trouble-shooters were forced to adjourn negotiations with the airline indefinitely last week when the parties failed to reach agreement on the amount offered by the carrier to bridge the gap in the pension fund.
Discussions with DAA are continuing and are expected back before the LRC.