F9 4427 then DL 1102 at Atlanta
Baltimore → Atlanta → St Louis
Timetable, Atlanta time
12:52F9 4427 from Baltimore at the gate
12:40DL 1102 to St Louis leaves the gate
23 h 48 apart on the timetable, overnight
DL 1102 leaves 23 h 48 after F9 4427 arrives on the timetable: more than half a day, so not a connection we count.