Sailing end of April to November. Fares TBA, bookings from end of January.
https://www.independent.ie/life/travel/travel-news/first-ever-direct-ferry-route-announced-from-ireland-to-spain-36493404.html
https://www.independent.ie/life/travel/travel-news/first-ever-direct-ferry-route-announced-from-ireland-to-spain-36493404.html