DL 5236 then DL 1172 at Atlanta
Augusta → Atlanta → Allentown
Timetable, Atlanta time
12:50DL 5236 from Augusta at the gate
15:20DL 1172 to Allentown leaves the gate
2 h 30 apart on the timetable
The last days
DL 5236 and DL 1172 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.