AA 5456 then DL 2266 at Atlanta
Philadelphia → Atlanta → Buffalo
Timetable, Atlanta time
13:00AA 5456 from Philadelphia at the gate
12:52DL 2266 to Buffalo leaves the gate
23 h 52 apart on the timetable, overnight
DL 2266 leaves 23 h 52 after AA 5456 arrives on the timetable: more than half a day, so not a connection we count.