BA 1349 then OS 336 at Heathrow
Saint Helier → London → Vienna
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
14:50OS 336 to Vienna leaves the gate
22 h 30 apart on the timetable, overnight
OS 336 leaves 22 h 30 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.