AA 9951 then DL 1692 at Philadelphia
Norfolk → Philadelphia → Atlanta
Timetable, Philadelphia time
10:57AA 9951 from Norfolk at the gate
17:17DL 1692 to Atlanta leaves the gate
6 h 20 apart on the timetable
The last days
AA 9951 and DL 1692 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.