I'm thinking of booking a complicated itinerary with AA, all in I class. Originating from Budapest to HNL, all on AA flight codes, but on AY, BA and AA metal. BA can't ticket it for some reason, so I can't take advantage of their generous Covid policy.

If worst comes to worst and I decide not to fly in December, what will my options be? My preference would be for voucher (less any charges) or refund (unlikely?).

AA list here I can make a voluntary change for up to $750.

• Are changes likely to cost the maximum $750? Can I determine this in advance?
• Is it possible to use the value of the remaining booking for another trip entirely? If so, can this trip be beyond the original flights dates and/or ticket validity?
• Do I have to decide at the time of cancellation/voluntary change the new destination, or can I "park" the booking and decide later?