AA 3931 then WN 3075 at Detroit
Miami → Detroit → St Louis
Timetable, Detroit time
18:26AA 3931 from Miami at the gate
18:20WN 3075 to St Louis leaves the gate
23 h 54 apart on the timetable, overnight
WN 3075 leaves 23 h 54 after AA 3931 arrives on the timetable: more than half a day, so not a connection we count.