FR 6570 then FR 1814 at Fiumicino
Copenhagen → Rome → Porto
Timetable, Rome time
11:30FR 6570 from Copenhagen at the gate
07:45FR 1814 to Porto leaves the gate
20 h 15 apart on the timetable, overnight
FR 1814 leaves 20 h 15 after FR 6570 arrives on the timetable: more than half a day, so not a connection we count.