DL 6770 then QY 821 at Madrid
New York JFK → Madrid → Porto
Timetable, Madrid time
11:10DL 6770 from New York JFK at the gatealso RO 9429
17:37QY 821 to Porto leaves the gate
6 h 27 apart on the timetable
The last days
DL 6770 and QY 821 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.