DL 562 then DL 543 at Atlanta
Seattle → Atlanta → St Louis
Timetable, Atlanta time
16:13DL 562 from Seattle at the gate
15:45DL 543 to St Louis leaves the gate
23 h 32 apart on the timetable, overnight
DL 543 leaves 23 h 32 after DL 562 arrives on the timetable: more than half a day, so not a connection we count.