AA 1802 then DL 1999 at Miami
San Diego → Miami → New York JFK
Timetable, Miami time
05:14AA 1802 from San Diego at the gate
11:29DL 1999 to New York JFK leaves the gate
6 h 15 apart on the timetable
The last days
AA 1802 and DL 1999 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.