Ok, lets try this again with the right airport. Departure informatin for two hour intervals can be found at:
http://www.flightarrivals.com/cgi-bi....woa/wa/qbastl
click on departures, then airport and a list will come up. Click on one of the arrows next to destination and it will sort them to make it easy to get rid of duplicates. Y0ou will have to do it every couple of hours to get a full days worth.
If you have a particular airline you are interested in, there is a list of all the airlines serving Saint Louis at
http://www.lambert-stlouis.com/aircarrier/index.htm
You can use the same link above, click on departures, then airline and airport, and put in the airline and get six hours worth of non stops.
Some of the individual airlines stand alone electronic timetables let you choose a departure city, then put in the selction "any airport", click on nonstop, and any nonstops from that airport will be shown. Again, it won't do all airlines at once, but if you narrow it down it will help.
Not as easy as Salt Lake

but doable