UX 52 then FR 572 at Madrid
Havana → Madrid → Porto
Timetable, Madrid time
13:30UX 52 from Havana at the gatealso MU 4979
11:15FR 572 to Porto leaves the gate
21 h 45 apart on the timetable, overnight
FR 572 leaves 21 h 45 after UX 52 arrives on the timetable: more than half a day, so not a connection we count.