AA 2103 then AA 1758 at DFW
St Louis → Dallas-Fort Worth → Memphis
Timetable, Dallas-Fort Worth time
09:33AA 2103 from St Louis at the gate
22:11AA 1758 to Memphis leaves the gate
12 h 38 apart on the timetable
AA 1758 leaves 12 h 38 after AA 2103 arrives on the timetable: more than half a day, so not a connection we count.