OS 264 then FR 1645 at Vienna
Stuttgart → Vienna → Rome
Timetable, Vienna time
10:35OS 264 from Stuttgart at the gate
06:10FR 1645 to Rome leaves the gate
19 h 35 apart on the timetable, overnight
FR 1645 leaves 19 h 35 after OS 264 arrives on the timetable: more than half a day, so not a connection we count.