America West, yes I forgot about them and Midwest too. We still have lots of empty gates at the STL airport from the TWA days. I heard last year (rumor mill) that Frontier was in talks with the city about making STL a second hub....but so far nothing has happened.WT, there are plenty of them from Capital Air to America West.
The only one that was a significant loss was Midwest Express, which truly provided domestically for all passengers "the best care in the air". Of weird note, I was on a Midwest Express flight from DFW to MKE on the morning of 11SEP2001.