DL 2270 then AA 4796 at Philadelphia
Atlanta → Philadelphia → St Louis
Timetable, Philadelphia time
11:03DL 2270 from Atlanta at the gate
10:55AA 4796 to St Louis leaves the gate
23 h 52 apart on the timetable, overnight
AA 4796 leaves 23 h 52 after DL 2270 arrives on the timetable: more than half a day, so not a connection we count.