I am reaching out for some guidance in using Avios for a trip to the Caribbean late January 2026 (dates are reasonably flexible). I have been tracking availability from the start of 2026 and it appears that there are few seats if any available (except economy).

We require two seats outbound to Barbados (BGI), either premium economy or business and returns a couple of weeks later from either Antigua (ANU) or St Lucia (UVF). And if necessary, Barbados (BGI).

To secure seats I will book outgoing/inbound separately. At what time are the flights uploaded for booking? Are seats uploaded after the first day of booking?

Any advise would be much appreciated.