W4 6018 then FR 1814 at Fiumicino
Barcelona → Rome → Porto
Timetable, Rome time
11:55W4 6018 from Barcelona at the gate
11:00FR 1814 to Porto leaves the gate
23 h 05 apart on the timetable, overnight
FR 1814 leaves 23 h 05 after W4 6018 arrives on the timetable: more than half a day, so not a connection we count.