BA 1349 then BA 720 at Heathrow
Saint Helier → London → Zurich
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
16:00BA 720 to Zurich leaves the gate
23 h 40 apart on the timetable, overnight
BA 720 leaves 23 h 40 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.