A spokesperson said that the employees, who work as cabin crew, were on fixed term contracts.
However, a spokesperson for the IMPACT trade union says a further 10 Aer Lingus workers employed for less than two years are to be let go.
Communications Officer Niall Shanahan says Aer Lingus has released a figure of 55, but he says this refers to the number of staff who will receive redundancy, as opposed to the number being let go.
55 of the workers have been working for the company for more than two years; the remaining ten have been there less than two years, and will therefore not receive redundancy payments.
The spokesperson said staff had been notified by text message last night that management had met with their union IMPACT at the Labour Relations Commission and to expect a phone call to explain the position.
Management subsequently contacted the individuals concerned by phone to inform them that their contracts were not being renewed.
One union source said the majority of the fixed term contracts had been for a duration in excess of two years.
IMPACT official Christina Carney said she had spoken to the workers and they were devastated.
There was a lot of shock and anger at how they have been treated by the company and the manner in which the news was broken to them had only added to their distress.
She said they had worked very hard for the company over the last few years and were led to believe that they had a long term career in Aer Lingus.
She said many have mortgages and are now facing a very uncertain future.
She said IMPACT had written to the new Chief executive to outline the background to the situation.
