OS 557 then FR 1814 at Fiumicino
Vienna → Rome → Porto
Timetable, Rome time
19:15OS 557 from Vienna at the gate
14:20FR 1814 to Porto leaves the gate
19 h 05 apart on the timetable, overnight
FR 1814 leaves 19 h 05 after OS 557 arrives on the timetable: more than half a day, so not a connection we count.