F9 4707 then DL 5442 at Atlanta
Washington → Atlanta → Allentown
Timetable, Atlanta time
10:12F9 4707 from Washington at the gate
09:58DL 5442 to Allentown leaves the gate
23 h 46 apart on the timetable, overnight
DL 5442 leaves 23 h 46 after F9 4707 arrives on the timetable: more than half a day, so not a connection we count.