BA 1333 then BA 203 at Heathrow
Newcastle → London → Boston
Timetable, London time
17:10BA 1333 from Newcastle at the gate
17:00BA 203 to Boston leaves the gate
23 h 50 apart on the timetable, overnight
BA 203 leaves 23 h 50 after BA 1333 arrives on the timetable: more than half a day, so not a connection we count.