FB 437 then LH 74 at Frankfurt
Sofia → Frankfurt am Main → Düsseldorf
Timetable, Frankfurt am Main time
13:15FB 437 from Sofia at the gate
13:00LH 74 to Düsseldorf leaves the gate
23 h 45 apart on the timetable, overnight
LH 74 leaves 23 h 45 after FB 437 arrives on the timetable: more than half a day, so not a connection we count.