AA 665 then AA 4659 at JFK
Las Vegas → New York → Boston
Timetable, New York time
17:05AA 665 from Las Vegas at the gate
22:00AA 4659 to Boston leaves the gate
4 h 55 apart on the timetable
The last days
AA 665 and AA 4659 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.