FR 7920 then DL 6754 at Madrid
Shannon → Madrid → Porto
Timetable, Madrid time
12:50FR 7920 from Shannon at the gate
10:35DL 6754 to Porto leaves the gatealso AM 6893, EY 7517, AD 7868
21 h 45 apart on the timetable, overnight
DL 6754 leaves 21 h 45 after FR 7920 arrives on the timetable: more than half a day, so not a connection we count.