Originally Posted by
SeattleDavid
You don't show the full details but my guess is that one of these flights has a mainline connection for DFW-STL and the other has a non-mainline connection.
In my experience the "Flagship' flag only shows up when it fits the whole itinerary.
Unsure of what you mean by mainline / non-mainline connection? They are both on AA metal. No regionals involved.