BA 120 then BA 1348 at Heathrow
Cincinnati → London → Saint Helier
Timetable, London time
09:30BA 120 from Cincinnati at the gate
08:35BA 1348 to Saint Helier leaves the gate
23 h 05 apart on the timetable, overnight
BA 1348 leaves 23 h 05 after BA 120 arrives on the timetable: more than half a day, so not a connection we count.