I need some assistance from anybody who may be more savvy with this.

I will be returning from a business trip from KTN (Ketchikan, AK) back to Los Angeles, and need help with the KTN to SEA segment. I am booked in a Y bucket/fare class, and no status on AS (PLT on AA FWIW).

There are 3 flights daily on AS for KTN-SEA, and for whatever reason, all flights are sold out Dec 21, 22, and 23. The first day with availability is Dec 24. Preferred return date is Dec 22. I have verified and subscribed to alerts on Expert Flyer for all dates/flights.

First question is, what is going on to have zero availability?

Next, what steps (beyond what I have taken) shall I take to try to get a flight out sooner than Dec 24?