BA 1349 then BA 217 at Heathrow
Saint Helier → London → Washington
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
12:15BA 217 to Washington leaves the gate
19 h 55 apart on the timetable, overnight
BA 217 leaves 19 h 55 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.