BA 1349 then AA 109 at Heathrow
Saint Helier → London → Boston
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
13:10AA 109 to Boston leaves the gate
20 h 50 apart on the timetable, overnight
AA 109 leaves 20 h 50 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.