Aer Lingus at JetBlue Terminal @ JFK?
Out of all the carriers right now, Aer Lingus seems to be the cheapest Low Fare carrier to Ireland and the UK with a short connection and it looks like Aer Lingus is moving in with JetBlue at their terminal where Hawaiian Airlines also resides.
As the aviation markets change, so do the low cost leaders. Aer Lingus seems to have a good reputation. Won't be another month till Aer Lingus is at the JetBlue terminal. For non connection customers both T4 and T5 are really nice though, but I guess it more aligns Aer Lingus with JetBlue for connection flights.
Other airlines likely get more direct traffic to premium LHR non stop market with higher paying customer bases.
I still remember when a connection to Iceland on Icelandair were some of the cheapest flights to Western Europe because of its hub before the Economic crisis hit over there. Now planes fly longer and competition has shifted, but for those on a budget flying to the UK, Aer Lingus seems like a really nice way to fly if you can deal with a stopover.