FR 499 then DL 6754 at Madrid
London Stansted → Madrid → Porto
Timetable, Madrid time
19:20FR 499 from London Stansted at the gate
10:35DL 6754 to Porto leaves the gatealso AM 6893, EY 7517, AD 7868
15 h 15 apart on the timetable, overnight
DL 6754 leaves 15 h 15 after FR 499 arrives on the timetable: more than half a day, so not a connection we count.