Aer Lingus cabin crew based in Shannon have accepted proposals for lower crewing levels on new transatlantic routes from Shannon.
The employees had threatened to take strike action over management plans to close the Shannon base and outsource jobs after cabin crew refused to fly three new routes using smaller planes with lower crewing levels.
Aer Lingus had said it would outsource cabin crew jobs on three new transatlantic routes from Shannon.
83% of the Shannon-based cabin crew have accepted the proposals which emerged from talks last week at the Labour Relations Commission.
Under the new arrangements, the Shannon cabin crew base will be retained, and the work on the new routes will be carried out by direct Aer Lingus employees.
The initial flights from 6 January will operate with five cabin crew where possible to facilitate training and familiarisation with the new aircraft type.
However, the proposals permit a complement of four on a minority of flights up to March.
There will be a review in July of the operation, and Aer Lingus will make all necessary information available to a union advisor subject to a confidentiality agreement.