The High Court will decide today if it'll grant Ryanair's application for an order aimed at stopping a strike by some of its pilots.
Passengers won't know if their flight on Thursday or Friday is cancelled until a ruling is made in the case.
At midnight tonight, 180 Ryanair pilots based in Dublin are due to start their 48 hour walkout.
The airline is trying to get an injunction against members of the Irish Airline Pilots Association, which is part of FORSA, to stop the strikes going ahead.
After more than two days, Judge Denis McDonald finished hearing submissions from both sides in the dispute yesterday.
He's acknowledged a lot of Ryanair passengers will be worried about their travel plans this weekend - and is expected to make a decision on whether or not to grant the order later this morning.
We'll then know what kind of flight disruption people can expect over the next few days - or if the strikes will go ahead at all.