BA 170 then BA 932 at Heathrow
Pittsburgh → London → Düsseldorf
Timetable, London time
09:40BA 170 from Pittsburgh at the gate
09:20BA 932 to Düsseldorf leaves the gate
23 h 40 apart on the timetable, overnight
BA 932 leaves 23 h 40 after BA 170 arrives on the timetable: more than half a day, so not a connection we count.