IB 5135 then FR 4587 at Barcelona
Alicante → Barcelona → Porto
Timetable, Barcelona time
15:50IB 5135 from Alicante at the gate
09:50FR 4587 to Porto leaves the gate
18 h apart on the timetable, overnight
FR 4587 leaves 18 h after IB 5135 arrives on the timetable: more than half a day, so not a connection we count.