Iceland Express at Belfast and Dublin...
I note that some flights go via Edinburgh so that means some passengers who want to travel to the US and connect in Iceland will be flying BFS EDI KEF BOS/NYC
so that 3 flights, not sure that will be an appeal. Furthermore, with only 2 flights per week how can they get their name out there, ie cost of marketing with what would seem like a small marketing budget, again if only 2 flights per week. I personally think this wont work.
Dublin on the other hand will have 1 weekly flight this might work but cant understand a greater frequency from BFS than DUB, with Dublin being a bigger city and a capital city for that matter.
However, if the BFS flight was designated BFS KEF YYZ/Toronto it could do ok, provided some of the travel agents got behind it.