DL 5697 then AA 4425 at Boston
Richmond → Boston → Buffalo
Timetable, Boston time
08:47DL 5697 from Richmond at the gate
08:00AA 4425 to Buffalo leaves the gate
23 h 13 apart on the timetable, overnight
AA 4425 leaves 23 h 13 after DL 5697 arrives on the timetable: more than half a day, so not a connection we count.