UA 5 then BA 932 at Heathrow
Houston → London → Düsseldorf
Timetable, London time
10:15UA 5 from Houston at the gate
09:15BA 932 to Düsseldorf leaves the gate
23 h apart on the timetable, overnight
BA 932 leaves 23 h after UA 5 arrives on the timetable: more than half a day, so not a connection we count.