F9 3566 then WN 1582 at Detroit
Denver → Detroit → St Louis
Timetable, Detroit time
15:30F9 3566 from Denver at the gate
14:55WN 1582 to St Louis leaves the gate
23 h 25 apart on the timetable, overnight
WN 1582 leaves 23 h 25 after F9 3566 arrives on the timetable: more than half a day, so not a connection we count.