F9 4409 then DL 210 at Atlanta
Washington → Atlanta → Cape Town
Timetable, Atlanta time
23:13F9 4409 from Washington at the gate
21:05DL 210 to Cape Town leaves the gate
21 h 52 apart on the timetable, overnight
DL 210 leaves 21 h 52 after F9 4409 arrives on the timetable: more than half a day, so not a connection we count.