BA 903 then VS 11 at Heathrow
Frankfurt am Main → London → Boston
Timetable, London time
17:25BA 903 from Frankfurt am Main at the gate
17:20VS 11 to Boston leaves the gate
23 h 55 apart on the timetable, overnight
VS 11 leaves 23 h 55 after BA 903 arrives on the timetable: more than half a day, so not a connection we count.