F9 4409 then DL 950 at Atlanta
Washington → Atlanta → Washington National
Timetable, Atlanta time
20:27F9 4409 from Washington at the gate
16:40DL 950 to Washington National leaves the gate
20 h 13 apart on the timetable, overnight
DL 950 leaves 20 h 13 after F9 4409 arrives on the timetable: more than half a day, so not a connection we count.