VS 12 then BA 932 at Heathrow
Boston → London → Düsseldorf
Timetable, London time
09:55VS 12 from Boston at the gate
09:20BA 932 to Düsseldorf leaves the gate
23 h 25 apart on the timetable, overnight
BA 932 leaves 23 h 25 after VS 12 arrives on the timetable: more than half a day, so not a connection we count.