Tony Woodley, joint leader of Unite, will travel to London from Manchester - where his union is holding its annual conference - to meet the airline under conciliation service Acas.
The surprise move was revealed as cabin crew continued with industrial action although there was little sign of a breakthrough to the deadlocked row.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? firstname.lastname@example.org