I like cheap. One of my best stories is the time the Vikings, Louise, & I bought 7£ tickets to Edinburgh just in case it worked out in our plans. If not, oh well, throw them away. (We went.)
Last I checked, the trouble with Ireland is that it isn't (yet) a big enough hub for grabbing other brands of Chicken Air flights. STN, AMS, or -increasingly- CPH have the mass of connections to make country-hopping cheaper than taxi fare to the airport.