AZ 571 then FR 1644 at Fiumicino
Zurich → Rome → Vienna
Timetable, Rome time
12:25AZ 571 from Zurich at the gate
06:25FR 1644 to Vienna leaves the gate
18 h apart on the timetable, overnight
FR 1644 leaves 18 h after AZ 571 arrives on the timetable: more than half a day, so not a connection we count.