BA 1349 then AY 1336 at Heathrow
Saint Helier → London → Helsinki
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
16:15AY 1336 to Helsinki leaves the gate
23 h 55 apart on the timetable, overnight
AY 1336 leaves 23 h 55 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.