DL 5374 then DL 4970 at Atlanta
Columbus (Georgia) → Atlanta → Allentown
Timetable, Atlanta time
20:59DL 5374 from Columbus (Georgia) at the gate
20:10DL 4970 to Allentown leaves the gate
23 h 11 apart on the timetable, overnight
DL 4970 leaves 23 h 11 after DL 5374 arrives on the timetable: more than half a day, so not a connection we count.