For what it's worth, most Irish Americans in BOS area are from the West Coast of Ireland - for whatever reason, I am not sure, but it seems that's how the migration patterns have been. Galway, Donegal, Kerry, Sligo.

Many of the new immigrants come from Dublin - but that seems to have been in the last 10 years or so.

Many BOS Irish have gone on vacation to Ireland to look up relatives or see where their family came from - tracing their roots. Most of the local BOS-SNN traffic is therefore going to the West Coast of Ireland because that's where their families came from.

Several airlines have had service BOS-SNN - years ago NW (when it was still called Northwest Orient) used to fly a DC-10, scheduled charters through Crystal Travel, etc. Aer Lingus flies 2 widebodies/day in high season. There's a lot of BOS-SNN traffic out there - not to even mention that the Irish LOVE Boston as well and come here on vacation.