I just booked the inaugural flight from BNA to DUB on April 12.

Oddly, it was a lot cheaper to fly in J RT from BNA-DUB-XXX than it was BNA-DUB round trip.

I wanted to spend some time in Ireland on the way back, but even returning DUB-BNA was about $600 more expensive than XXX-DUB-BNA

In my case, the XXX is BER. But almost any airport on the continent was cheaper than flying back round trip from BNA to DUB.

Anyway, it is by far the cheapest J fare I could find to Berlin and I am excited to be on the inaugural route. I won't even worry if I get lounge access in BNA as there will probably be some festivities at the gate (maybe even cake).