Talks between Ryanair and pilots union Fórsa are set to resume tomorrow morning following three days of talks earlier this week.
The talks are focused on issues including base transfers, promotions and leave, and are being mediated by the former head of the Workplace Relations Commission, Kieran Mulvey.
The talks began on Monday following a fifth one-day strike by around 100 of Ryanair's 350 Irish-based pilots last week.
They adjourned their third - and what was to be their final - day of talks just after midnight this morning, following more than 12 hours of discussions.
Tuesday's discussions also lasted more than 12 hours.
Both sides are now due to meet in Dublin Airport again, at 10am tomorrow morning.
The union negotiating team is made up of representatives of Ryanair pilots, who are members of the Irish Air Line Pilots' Association and Fórsa officials, assisted by ICTU General Secretary Patricia King.
IALPA is affiliated to Fórsa.
Mr Mulvey has asked both sides to refrain from making comments to the media while talks are ongoing.