Originally Posted by
WWads
DL's Twitter will tell you if a flight is oversold.
But, they don't usually tell you by how many.
I had a flight last week that appeared to be sold out. I called, and was told that it WAS overbooked. I asked - by how many. I was told - "By a handful".
I called again a couple of hours later and was told - "By a few".
If you want to know how many it's overbooked/sold by, you need to know someone who has Deltanet.