Cheap Flight from Bristol to Dublin or Belfast? x?

Im going to visit my Uncle and Auntie in Ireland and need a cheap flight from Bristol to Dublin or Belfast, I find flights to there for like �1.99 and like OMG click and then find out that theres about �50 worth of tax and surcharges and goes up to about �66! I need a real cheap flight, Under �30 will be grand. Btw, Im 16, i'm not earning megabucks yet! lol x