AA 1416 then AA 498 at Boston
Philadelphia → Boston → New York LaGuardia
Timetable, Boston time
12:18AA 1416 from Philadelphia at the gate
17:20AA 498 to New York LaGuardia leaves the gate
5 h 02 apart on the timetable
Boston’s board gives an arrival time for only about 59% of its flights, so many days show no gate time.
The last days
AA 1416 and AA 498 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.