AA 402 then DL 8851 at Philadelphia
Miami → Philadelphia → New Orleans
Timetable, Philadelphia time
09:33AA 402 from Miami at the gate
12:15DL 8851 to New Orleans leaves the gate
2 h 42 apart on the timetable
The last days
AA 402 and DL 8851 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.