FR 6973 then FR 1644 at Fiumicino
Barcelona → Rome → Vienna
Timetable, Rome time
00:55FR 6973 from Barcelona at the gate
18:15FR 1644 to Vienna leaves the gate
17 h 20 apart on the timetable
FR 1644 leaves 17 h 20 after FR 6973 arrives on the timetable: more than half a day, so not a connection we count.