OK, so the same problem as I had above then, and on a number of ex-HND DONE fares to be honest, even when not 9 months out.

I would observe that I have managed to get on the transcontinental in the end, but this required a lot of calls to see if anything opened up (since EF doesn't give an accurate result) and so you're basically shooting in the dark. To give an idea the last time I needed to change from JFK-LAX to BOS-LAX, about 3 days in advance. That meant a worse lounge but better flight. And with 25 hours in Boston to create a break in segments, I was coming from MIA.

Personally I'd just take the other flights in AS business and then see what happens closer to the time. I'd rather have a backup that isn't economy if I've paid for business.

To be honest with a DONE5 or 6 I'm amazed you have that many segments to want to do much in the USA, I'd have personally done something like into JFK/DFW from CX or JL, down to South America on a real international flight, back up and then out to Europe via QR/Doha? Better than any transcontinental experience by a long way.