FR 5817 then FR 1644 at Fiumicino
Bari → Rome → Vienna
Timetable, Rome time
20:30FR 5817 from Bari at the gate
18:15FR 1644 to Vienna leaves the gate
21 h 45 apart on the timetable, overnight
FR 1644 leaves 21 h 45 after FR 5817 arrives on the timetable: more than half a day, so not a connection we count.