Fares to Dublin even for peak summer travel are very, very cheap right now. Around $538 to $688 RT including tax. From Dublin, you can hop on Ryanair or another cheapo European airline to other destinations in Europe.
But Ireland is a pretty nice place to visit in and of itself. Lovely scenery, historic castles, friendly natives, good food, charming B&B's, and the Euro has gone down in value vs. the dollar.