Ask Aer Arann...it will be a full charter by a travel agent in DUB. They also have other destination such as ORK which they fly charters for the travel agents.
They would give you a full price and basically you would just use it as if it was a scheduled service. You would turn up at the airport as usual, check in and then get on board. Everything would be the same. The only thing you would have to worry about is the score line.
As a way of price, I am unsure.