DL 4671 then DL 1371 at Detroit
Harrisburg → Detroit → St Louis
Timetable, Detroit time
13:47DL 4671 from Harrisburg at the gate
12:40DL 1371 to St Louis leaves the gate
22 h 53 apart on the timetable, overnight
DL 1371 leaves 22 h 53 after DL 4671 arrives on the timetable: more than half a day, so not a connection we count.