AA 5660 then DL 2868 at Detroit
Washington National → Detroit → St Louis
Timetable, Detroit time
09:01AA 5660 from Washington National at the gate
08:40DL 2868 to St Louis leaves the gate
23 h 39 apart on the timetable, overnight
DL 2868 leaves 23 h 39 after AA 5660 arrives on the timetable: more than half a day, so not a connection we count.