DL 1012 then DL 2266 at Atlanta
Memphis → Atlanta → Buffalo
Timetable, Atlanta time
12:54DL 1012 from Memphis at the gate
12:52DL 2266 to Buffalo leaves the gate
23 h 58 apart on the timetable, overnight
DL 2266 leaves 23 h 58 after DL 1012 arrives on the timetable: more than half a day, so not a connection we count.