BA 1349 then BA 273 at Heathrow
Saint Helier → London → San Diego
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
12:45BA 273 to San Diego leaves the gate
20 h 25 apart on the timetable, overnight
BA 273 leaves 20 h 25 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.