IB 5137 then FR 4587 at Barcelona
Alicante → Barcelona → Porto
Timetable, Barcelona time
18:25IB 5137 from Alicante at the gate
09:50FR 4587 to Porto leaves the gate
15 h 25 apart on the timetable, overnight
FR 4587 leaves 15 h 25 after IB 5137 arrives on the timetable: more than half a day, so not a connection we count.