I’m on it, Don! Thank you very much, and I hope this helps someone else, as well.

The kid and his girlfriend were hoping for late summer/early fall.
The Swissair sale actually looked promising, but I will check this one out right away.

update:
WOW.
We already have BA tickets for him to go to the wedding out west, but he was hoping to come visit us here at the end of the summer. August is in the 700-800 euro range, so forget that, but early September (it will be plenty warm here) is 400 euro per person.
Combined with Jetblue, this could really work well.

Maybe they will do well this summer and continue at a later time—I’d be curious to see if I could work out a good arrangement for myself.