AA 552 then DL 9963 at Atlanta
Dallas-Fort Worth → Atlanta → Philadelphia
Timetable, Atlanta time
16:32AA 552 from Dallas-Fort Worth at the gate
21:10DL 9963 to Philadelphia leaves the gate
4 h 38 apart on the timetable
The last days
AA 552 and DL 9963 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.