I don't think there are any non-charter ski destinations from Cork?
I suppose Katowice could be used for skiing in Zakopane, but Poland seems to be a bit off the agenda in Ireland when it comes to skiing destinations.
There are a few routes that are served in Summer that could provide access to ski resorts in Winter - Zurich, Barcelona, Carcassonne, Nice, Bergamo. There could be an opportunity to work with tour operators to make one year-round, but none are ideal. The last four are all 3+ hours from the nearest ski resort, while everything in Switzerland is so expensive, it makes it unattractive for most people looking for a ski holiday.