FR 1815 then FR 5316 at Fiumicino
Porto → Rome → Madrid
Timetable, Rome time
20:40FR 1815 from Porto at the gate
10:20FR 5316 to Madrid leaves the gate
13 h 40 apart on the timetable, overnight
FR 5316 leaves 13 h 40 after FR 1815 arrives on the timetable: more than half a day, so not a connection we count.