AA 665 then AA 2603 at JFK
Las Vegas → New York → Miami
Timetable, New York time
17:05AA 665 from Las Vegas at the gate
17:45AA 2603 to Miami leaves the gate
40 min apart on the timetable
The last days
AA 665 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.