Pilots with Aer Lingus are expected to announce further strike action later as part of a pay row.
The disputes committee of the trade union Forsa is to meet today to decide whether or not to sanction a further withdrawal.
It's after talks between Aer Lingus and the pilots union IALPA - a branch of Fórsa - broke down without agreement yesterday.
Tomorrow's work stoppage by pilots will hit holiday flights out of Cork Airport to Lanzarote and Dubrovnik tomorrow as well as the London/Heathrow service
Airport safety and security expert Kevin Byrne believes IALPA will serve the airline with more strikes:
"It would be normal to up the ante a little bit more, and that would be maybe a ten hour strike, or a five hour strike, or whatever they might do again, or they could pull, you know, and say, we go for two days, as was the case, for example, in Britain, when the rail companies were on strike. You notch it up inch by inch and see what happens, and you wait for a response from the company. But there's no not a lot of apparent goodwill on either side, just at the moment"