DL 5287 then DL 1371 at Detroit
Harrisburg → Detroit → St Louis
Timetable, Detroit time
13:52DL 5287 from Harrisburg at the gate
12:40DL 1371 to St Louis leaves the gate
22 h 48 apart on the timetable, overnight
DL 1371 leaves 22 h 48 after DL 5287 arrives on the timetable: more than half a day, so not a connection we count.