Originally Posted by BegginForPoints

I've done a little tracking for an SFO-BCN non-stop flight from mid-July to the present. In mid July there were several close in business saver (80k) awards available on multiple days and this went on until mid August, when it basically stopped. In reviewing the day of departure flights, there didn't seem to be a large difference in the number of seats available. I believe this flight has about 57 seats and up to 16 are still available on the day of the flight. I read that cash fares dipped in July due to lower demand, and am wondering if that had something to do with it? Does anyone understand why this change in availability might be? or any understanding of an algorithm they use?