AA 478 then AA 3274 at Miami
New York LaGuardia → Miami → Philadelphia
Timetable, Miami time
11:41AA 478 from New York LaGuardia at the gate
19:46AA 3274 to Philadelphia leaves the gate
8 h 05 apart on the timetable
The last days
AA 478 and AA 3274 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.