LS 804 then LS 931 at Manchester
Barcelona → Manchester → Valletta
Timetable, Manchester time
15:30LS 804 from Barcelona at the gate
10:00LS 931 to Valletta leaves the gate
18 h 30 apart on the timetable, overnight
LS 931 leaves 18 h 30 after LS 804 arrives on the timetable: more than half a day, so not a connection we count.