SIPTU says they'd welcome new intervention to resolve their pension dispute which is threatening disruption at Dublin, Cork and Shannon airports.
Counting of votes is getting underway after members at Aer Lingus were balloted on whether to take industrial action.
SIPTU members at Dublin and Cork airports have approved the idea, and a result of today's count is expected this afternoon.
Tourism chiefs are warning of the impact of any air disruption around the timing of Six Nations rugby matches or Saint Patrick's Day.
