The board of Aer Lingus has agreed to proceed with a cost-reduction programme that it says will deliver substantial savings to the airline.
The measures could see the airline slash costs by up to €100m.
Concerns have been expressed that up to 1,500 jobs could now be axed at the national carrier.
Trade unions SIPTU and IMPACT met with Aer Lingus this week and voiced their opposition to the proposals.
The company has said that management will now meet with staff and their representatives again next week, to discuss how the plans can be achieved.