Efforts were ongoing at the Labour Relations Commission (LRC) last night to try and salvage talks aimed at resolving the Aer Lingus cabin crew dispute.
There was informal contact between Aer Lingus, the LRC and the trade union Impact.
Talks broke down on Friday and the LRC was trying last night to assess whether there was any point to further formal discussions.
The row centres on new roster plans from the airline, which would see the flying hours of cabin crew being increased to 850 per annum from 830 currently.
Impact claims the hours can be increased under the existing roster arrangements.
More than 200 crew have already been suspended from the payroll because of the dispute, while up to 12 flights a day have been cancelled.
One cancellation led to a delay in Flight EI1551 from Lyon returning to Dublin yesterday.
A spokesman for Aer Lingus said the delay was due to a "technical failure" in a replacement plane which was arranged days ago.
He added that Aer Lingus was working to get passengers home as soon as possible.
The latest dispute over rostering has been festering for more than two weeks.
While sources on both sides had initially expected an early resolution, it is not clear now whether talks will resume or be successful.
Meanwhile, Aer Lingus has announced that as part of its phased transition to Terminal 2 at Dublin Airport all continental European flights will operate from the new terminal from tomorrow.
All Aer Lingus flights between Dublin and London have already moved to T2.
The airline is advising all departing passengers travelling to London and continental Europe to present at T2 for departure.
Aer Lingus also confirmed yesterday the transfer of further transatlantic flights to the €600m Terminal 2 at the airport. From tomorrow, Continental Airlines flights will fly from the new terminal, while all transatlantic flights will be transferred by February 22.