@Ryan2000
If I arrived in Dublin from North America or the Middle East , I'd still prefer the comfort of a short flight to Cork than a 3 and a half hour journey by coach but maybe I'm an exception.
But is this an adequate description of the situation? Would you expect a lot of Cork-bound businessmen to arrive off flights in DUB from different locations at much the same time, so that a single departure to ORK would suit them all?
Isn't that the key weakness? If I arrive back in DUB at 3:00pm (say) I can just hit the road, and hopefully be back in Cork in 3 and a half hours. That's a better alternative to waiting four hours to board (say) a 7:00pm departure to ORK.
(Obviously the example is only illustrative to make the point - which is frequency.)