Aer Lingus has gained shareholder approval for its proposed €190.7m contribution to its pension scheme, which has an estimated €750m deficit.
A large majority of voters at the airline's Extraordinary General Meeting supported the plan, which came about after four years of discussions.
The contribution was previously backed by Aer Lingus staff, which will see the airline made a lump sum contribution to mitigate cuts in benefits for scheme members.
The joint Aer Lingus/Dublin Airport Authority pension scheme, known as the Irish Aviation Superannuation Scheme (IASS), currently has a deficit estimated at around €750m.
More than 200 protesters demonstrated outside the Radisson Hotel in Dublin airport this afternoon, where the EGM took place.
Aer Lingus pensioners banged on the windows of the room where the meeting was held, while a number of speakers inside said pensioners had not been consulted and their views had not been taken into account.
Cries "shame on you" and "how do you sleep at night" were made from the floor.
Chair of the company Colm Barrington said the company has said that it has met all its obligations. But one pensioner and shareholder said they had not met one single moral obligation.
One pensioner appealed to the management to ask them could they do something for the people that have worked all their life for the company.
One pensioner and shareholder said like Waterford Glass they would win out in the end.
In the end, more than 421.8m votes were cast in favour of the proposal, while more than 1.9m were made against.