AM 21 then FR 572 at Madrid
Mexico City → Madrid → Porto
Timetable, Madrid time
15:40AM 21 from Mexico City at the gate
09:20FR 572 to Porto leaves the gate
17 h 40 apart on the timetable, overnight
FR 572 leaves 17 h 40 after AM 21 arrives on the timetable: more than half a day, so not a connection we count.