Had Mint booked via AA tonight on BOS-SEA, but flight was delayed and AC swapped for one without Mint. No voucher was offered, simply a refund of the fare difference.

I asked to be rebooked on another flight in J. Unsure of whether they could actually rebook on AA, as those flights were mostly sold out. Was gunning for the A321T, but those were sold out in all but F.

Was rebooked in Mint to LAX with a connection (in Y) tomorrow morning. But neither AA nor B6 will provide a hotel voucher, saying it was a voluntary change - allowable with no fare difference due to the mx delay.

Possibly confounding this is that B6 never changed my Cabin code from J or [EDIT] notified me of a cabin change. They kept me in the same seat #, and AA saw it still as in J - there also seems to be no official papertrail of a downgrade.

I tried to argue that B6 should be on the hook for a hotel voucher, as they could not offer the cabin I booked same-day. But to no avail. Might try to claim with Amex, though not sure if this situation is covered.