Ryanair pilots are on strike this morning.
The airline has cancelled 30 of 290 scheduled flights, but has already alerted affected customers.
The company says if customers have not received notifications, they should travel as normal.
Bernard Harbour from trade union Forsa says yesterday's talks were promising, but they just ran out of time.
He said: "We did try to explore the potential of a working group to deal with the real issues.
"I think everybody kind of accepted at this late stage of the game, it was unlikely that we were going to crack this with a strike breathing down our neck."
The dispute centres on issues like union recognition, base transfers and seniority.
Ryanair has said the disruption is “unnecessary” and insisted it has already sent the FÓRSA union “written proposals on seniority, annual leave and base transfers.”
The Commission for Aviation Regulation has urged affected passengers to make themselves aware of their entitlements in the event the strike does go ahead.
- If a flight is cancelled, the airline is obliged to offer:
- Re-routing as soon as possible
- Re-routing at a later date at your convenience
- A refund.
Full details of passenger entitlements are available here.