FR 4586 then UX 937 at Barcelona
Porto → Barcelona → Madrid
Timetable, Barcelona time
19:45FR 4586 from Porto at the gate
10:45UX 937 to Madrid leaves the gate
15 h apart on the timetable, overnight
UX 937 leaves 15 h after FR 4586 arrives on the timetable: more than half a day, so not a connection we count.