OS 164 then FR 1645 at Vienna
Düsseldorf → Vienna → Rome
Timetable, Vienna time
16:35OS 164 from Düsseldorf at the gate
06:10FR 1645 to Rome leaves the gate
13 h 35 apart on the timetable, overnight
FR 1645 leaves 13 h 35 after OS 164 arrives on the timetable: more than half a day, so not a connection we count.