The airline this week confirmed it was weighing up the "long-term viability" of its Manchester operation. Options, it said, include "the possibility of a base closure".
Aer Lingus met with staff this week to brief them on the base's performance and confirmed it will enter into collective consultation with their representatives.
"Despite all of the work and best efforts of the team, the Manchester long-haul operating margin performance continues to significantly lag behind that of Aer Lingus’s Irish long-haul operating margin," said the airline in a statement. "This situation has prompted a necessary consideration of the long-term viability of the Manchester base."