AA 4394 then AA 2199 at Boston
New York LaGuardia → Boston → Miami (MIA)
Timetable, Boston time
09:07AA 4394 from New York LaGuardia at the gate
16:56AA 2199 to Miami (MIA) leaves the gate
7 h 49 apart on the timetable
The last days
AA 4394 and AA 2199 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.