AA 753 then DL 3167 at Atlanta
Philadelphia → Atlanta → Dayton
Timetable, Atlanta time
21:00AA 753 from Philadelphia at the gate
20:30DL 3167 to Dayton leaves the gate
23 h 30 apart on the timetable, overnight
DL 3167 leaves 23 h 30 after AA 753 arrives on the timetable: more than half a day, so not a connection we count.