Aer Lingus says pay rises being sought by pilots are 'outrageous'.
There are fears flights could be grounded within weeks after members of the Irish Airline Pilots Association voted to strike.
They want wage hikes of up to 24 per cent, despite the Labour Court recommending a 9 per cent rise.
Donal Moriarty Chief Corporate Affairs Officer at Aer Lingus says the demand is 'untenable'
"They're looking for a €50,000 pay €50,000 increase for senior pilots. That increase is more than the total annual pay of 3,500 of our 5,500 employees. So aside from a corporate perspective, and for the future for our business. It's actually unconscionable."