The Irish flag carrier Aer Lingus says it is considering its next steps, after SIPTU members at the airline rejected a COVID-19 crisis recovery plan.
Workers voted by 55% to 45% to reject the plan proposed by the airline, which would have seen their hours and pay restored.
The proposals were put to a ballot of the union’s 1,500 members at Dublin, Cork and Shannon Airports over recent days.
In a statement, Aer Lingus said: "The plan would have allowed the gradual restoration of hours and pay and staff who have been laid-off would have returned to work.
"That restoration of hours and pay and return to work will not now take place.
"In the context of the unprecedented and deepening crisis being faced by the aviation industry in Ireland, Aer Lingus will now consider its next steps."
SIPTU divisional organiser Karan O’Loughlin said: "This is a very difficult and challenging time for our members in the aviation industry.
"We will now meet with workplace representatives to discuss the outcome of the ballot and to find a way forward that can protect the pay and employment of our members at the airline."