AA 497 then DL 1722 at Atlanta
Philadelphia → Atlanta → Chattanooga
Timetable, Atlanta time
15:46AA 497 from Philadelphia at the gate
19:05DL 1722 to Chattanooga leaves the gate
3 h 19 apart on the timetable
The last days
AA 497 and DL 1722 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.