Hi Antoine, thx for replying!! The link you sent 'transport for ireland' is great. I had already identified Eireann buses , the thing is the timing is too short .. 237 takes almost 3hrs to Cork; then I need to change bus station and if everything goes well I should arrive with the connexion at appx 11h45 in front of the airport, whereas my plane takes off at 13h20.. Kinda risky! I'll look if there's a cab company that could drive me to the airport or take the bus from Roscaberry or Baltimore, especially if the connexion is express!
for the sailing part, we're leaving Cork and sailing in the south west coast, then coming back; it's going to depend on the weather conditions.. our trip is organized those days. If you have any good plans, I'm all ears ;-)
thanks again for your help