whats the cheapest way to get from dublin to dingle?
I think bus from Dublin-Dingle would be the cheapest but I would get the train from Dublin-Tralee and then the bus from Tralee-Dingle. It will save you 2 hours and a more comfortable journey.
you can get reasonable rates on rail travel on the dublin tralee route €12 -22
one way if you book online with a creditcard then get a bus from tralee bus station and train station are in the same place in tralee.