AA 4350 then AA 2603 at JFK
Nashville → New York → Miami
Timetable, New York time
14:30AA 4350 from Nashville at the gate
17:45AA 2603 to Miami leaves the gate
3 h 15 apart on the timetable
The last days
AA 4350 and AA 2603 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.