U2 6841 then OS 144 at Zurich
Porto → Zurich → Vienna
Timetable, Zurich time
21:05U2 6841 from Porto at the gate
19:25OS 144 to Vienna leaves the gate
22 h 20 apart on the timetable, overnight
OS 144 leaves 22 h 20 after U2 6841 arrives on the timetable: more than half a day, so not a connection we count.