DL 5256 then DL 1371 at Detroit
Toronto → Detroit → St Louis
Timetable, Detroit time
13:34DL 5256 from Toronto at the gate
13:17DL 1371 to St Louis leaves the gate
23 h 43 apart on the timetable, overnight
DL 1371 leaves 23 h 43 after DL 5256 arrives on the timetable: more than half a day, so not a connection we count.