FR 7816 then FR 1814 at Fiumicino
Thessaloniki → Rome → Porto
Timetable, Rome time
10:15FR 7816 from Thessaloniki at the gate
07:45FR 1814 to Porto leaves the gate
21 h 30 apart on the timetable, overnight
FR 1814 leaves 21 h 30 after FR 7816 arrives on the timetable: more than half a day, so not a connection we count.