4Y 803 then LH 916 at Frankfurt
Bari → Frankfurt am Main → London Heathrow
Timetable, Frankfurt am Main time
22:204Y 803 from Bari at the gate
17:05LH 916 to London Heathrow leaves the gate
18 h 45 apart on the timetable, overnight
LH 916 leaves 18 h 45 after 4Y 803 arrives on the timetable: more than half a day, so not a connection we count.