DL 820 then AA 642 at JFK
Salt Lake City → New York → Miami
Timetable, New York time
06:00DL 820 from Salt Lake City at the gate
13:59AA 642 to Miami leaves the gate
7 h 59 apart on the timetable
The last days
DL 820 and AA 642 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.