OS 557 then FR 6974 at Fiumicino
Vienna → Rome → Barcelona
Timetable, Rome time
19:15OS 557 from Vienna at the gate
14:35FR 6974 to Barcelona leaves the gate
19 h 20 apart on the timetable, overnight
FR 6974 leaves 19 h 20 after OS 557 arrives on the timetable: more than half a day, so not a connection we count.