DL 1240 then DL 1371 at Detroit
Atlanta → Detroit → St Louis
Timetable, Detroit time
13:04DL 1240 from Atlanta at the gate
12:40DL 1371 to St Louis leaves the gate
23 h 36 apart on the timetable, overnight
DL 1371 leaves 23 h 36 after DL 1240 arrives on the timetable: more than half a day, so not a connection we count.