AA 873 then DL 5442 at Atlanta
Chicago O'Hare → Atlanta → Allentown
Timetable, Atlanta time
10:23AA 873 from Chicago O'Hare at the gate
09:58DL 5442 to Allentown leaves the gate
23 h 35 apart on the timetable, overnight
DL 5442 leaves 23 h 35 after AA 873 arrives on the timetable: more than half a day, so not a connection we count.