I just saw that Lufthansa subsidiary EW is offering €300 round trips on transatlantic routes like CGN-BOS (summer 2016, A330 with coach + premium economy). I was very surprised to see that EW provides PQM to people accruing to MileagePlus:
https://www.united.com/cms/en-us/mar...spx?itemid=668 .
Does anyone know whether you get LH / *A lounge access when flying EW and presenting UA *G/1K/GS credentials? I remember there is some kind of special carveout for 4U/UA *G, not sure about EW.