When FlyGlobespan operated Eire - US/Canada, it operated DUB & SNN to YYC & YVR on a B763. From BFS it operated to Orlando-Sanford. The aircraft were always full with pax & freight.
With the 757, we operated DUB, SNN & BFS to Toronto-Hamilton (YHM) and the loads again were always full.
But the route that amazed all of us was Knock - JFK operated by a 2-class 190 seat B757. The service originated ex-LPL with around 20 pax but always filled up ex-NOC. When we spoke to the Airport Manager, he wasn't surprised at all & said he always thought JFK, BOS & ORD would all do well from NOC. I don't know that part of Eire very well but when I spoke to our pax, they would say that the alternatives of BFS & SNN were a 3-5 hour drive away. Ideal for a B757 really.