Sample routing LGA-CLT-BCN-CLT-LGA, June 5-15, see here:
https://www.google.com/flights/#sear...GA0AA1725;a=AA
Prices all the way through to AA.com, you can put it on hold too.
Not just good for June, but compared with a lot of recent deals I was glad to see that it didn't end in April or May. In fact looks like great fares available until EOS.
I booked LGA-PHL-BCN-LHR-PHL-LGA for $587 each on the exact dates I needed for summer travel for 2 pax and was able to confirm SWUs on LGA-PHL-BCN at booking. Spent at least $2k less than I was thinking I would, with an upgrade to boot ^. Hope someone else can use this.
(Also looks like you can do LGA-MIA-BCN on the outbound for an additional $2.50 and get the total CPM down to 4.0)