DL 947 then DL 1371 at Detroit
Phoenix → Detroit → St Louis
Timetable, Detroit time
12:50DL 947 from Phoenix at the gate
12:40DL 1371 to St Louis leaves the gate
23 h 50 apart on the timetable, overnight
DL 1371 leaves 23 h 50 after DL 947 arrives on the timetable: more than half a day, so not a connection we count.