This subject has come up before and there is no simple, quick fix.
As some have mentioned, oce (someday ) the runway configuration is done that will help.
Perhaps someday high speed rail from such cities as Detroit,Grand Rapids, Indianapolis, St. Louis and perhaps a few others will take some of the O & D traffic , or some of the expected growth.
The short term solution remains the same, only so many planes can fit there at any given time. While I am not suggesting a return to Government controlled routes, etc (regulation) , I am suggesting there has to be a way to get UA
and the FAA/DOT/DOJ to work out some plan that lessens the amount of aircraft while each carrier is protected in its' competitive battle.
As I have mentioned here several times over the years, I would schedule more larger aircraft slightly less often on heavily travelled routes, ie: to LAX
, you get the idea. working to reduce frequency with increased capacity using more 757/767/777 rather than so many MD80/737/320's etc would help.
Also, perhaps as AA
gets stronger, they will start re-building STL
, by routing selected hi-volume connecting flights with a couple of banks per day to take the pressure off. In theory you could set up 2 west bound banks and 2 east bound banks over a 4-6 hour period and staff accordingly. Just an idea for consideration.