GQ 820 then FR 1644 at Fiumicino
Athens → Rome → Vienna
Timetable, Rome time
12:00GQ 820 from Athens at the gate
09:05FR 1644 to Vienna leaves the gate
21 h 05 apart on the timetable, overnight
FR 1644 leaves 21 h 05 after GQ 820 arrives on the timetable: more than half a day, so not a connection we count.