AA 4394 then AA 4629 at Boston
New York LaGuardia → Boston → Philadelphia
Timetable, Boston time
09:07AA 4394 from New York LaGuardia at the gate
15:00AA 4629 to Philadelphia leaves the gate
5 h 53 apart on the timetable
The last days
AA 4394 and AA 4629 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.