MQ 3553 then DL 2500 at Miami
New Orleans → Miami → New York JFK
Timetable, Miami time
12:55MQ 3553 from New Orleans at the gate
19:52DL 2500 to New York JFK leaves the gate
6 h 57 apart on the timetable
The last days
MQ 3553 and DL 2500 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.