Holidaymakers are facing huge disruption.
Irish travellers are facing massive delays and cancellations as Ryanair pilots prepare to go on strike.
Those based in Britain have already voted for industrial action - with pilots based here expected to do the same tomorrow.
It's off the back of a tough few weeks for Ryanair. Last week, the airline announced profits had fallen by 21% and CEO Michael O'Leary told staff about plans for up to 900 job cuts.
Yesterday, British-based pilots voted for industrial action which will take place over 5 days starting later this month. Ryanair says the decision will cause unneccesary disruption to people's holiday and travel plans.
Irish-based pilots are also expected to vote in favour of industrial action when the result of a ballot comes back tomorrow. That move could lead to thousands of people having their flights cancelled.