F9 4409 then DL 2334 at Atlanta
Washington → Atlanta → Buffalo
Timetable, Atlanta time
23:13F9 4409 from Washington at the gate
21:59DL 2334 to Buffalo leaves the gate
22 h 46 apart on the timetable, overnight
DL 2334 leaves 22 h 46 after F9 4409 arrives on the timetable: more than half a day, so not a connection we count.