I'm pretty sure I remember Aer Lingus selling flights to SFO in the late 80s, early 90s, on the B747, whether or not they were summer only/charters/scheduled, I dunno?
However whether re-instated or new, it's very much welcomed!
Does anybody have a list of Aer Lingus' e-ticket and interlining agreements. Would be interested to see who they link up with at SFO, especially for onwards to YVR or SEA?