EW 7520 then LL 5051 at Barcelona
Hamburg → Barcelona → Düsseldorf
Timetable, Barcelona time
18:45EW 7520 from Hamburg at the gate
18:00LL 5051 to Düsseldorf leaves the gate
23 h 15 apart on the timetable, overnight
LL 5051 leaves 23 h 15 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.