AA 4576 then DL 2266 at Atlanta
Washington National → Atlanta → Buffalo
Timetable, Atlanta time
13:03AA 4576 from Washington National at the gate
12:52DL 2266 to Buffalo leaves the gate
23 h 49 apart on the timetable, overnight
DL 2266 leaves 23 h 49 after AA 4576 arrives on the timetable: more than half a day, so not a connection we count.