Originally Posted by
roses777
I'm looking at some flights in the near future, and it seems sometimes a flight will disappear from the search results on the AA website with no warning, and then it sometimes reappears.
This would be quite unusual. Flights don't usually get completely sold out in all cabins suddenly and then reappear suddenly, except for perhaps a few very heavy travel days such as Christmas Eve or the day before Thanksgiving. Your search methodology may be the culprit here.