This has happened before, but seems to be worse the last day or so. When searching for flights, sometimes about half of the flights for a leg are missing. It's not that they are sold out. Have been monitoring ATL/AUS, and most of the time, only three flights show for the return.

Checking for a friend on a plane that leaves ATL to MSP today in about 2 hrs, the flight does not show up. He's monitoring the seat next to him.

Anyone else notice this? How can this happen?