SIPTU has served notice of industrial action on Aer Lingus, the Dublin Airport Authority and the Shannon Airport Authority this afternoon.
The trade union said today this notice followed the refusal of the companies to engage in meaningful talks or to present reasonable or fair proposals during discussions in recent days.
Discussions had been aimed at resolving the pensions crisis.
A four hour work stoppage at Dublin, Cork and Shannon Airports will take place from 5am to 9am on Friday, March 14.
SIPTU said its representatives remain available if the companies wish to enter discussions that could lead to a resolution of the pensions crisis.