AA 1017 then AA 4723 at Boston
Los Angeles → Boston → New York LaGuardia
Timetable, Boston time
16:29AA 1017 from Los Angeles at the gate
19:35AA 4723 to New York LaGuardia leaves the gate
3 h 06 apart on the timetable
The last days
AA 1017 and AA 4723 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.