OS 553 then FR 9903 at Fiumicino
Vienna → Rome → Lisbon
Timetable, Rome time
14:15OS 553 from Vienna at the gate
14:00FR 9903 to Lisbon leaves the gate
23 h 45 apart on the timetable, overnight
FR 9903 leaves 23 h 45 after OS 553 arrives on the timetable: more than half a day, so not a connection we count.