LL 5423 then FR 3166 at Barcelona
London Heathrow → Barcelona → Palermo
Timetable, Barcelona time
13:10LL 5423 from London Heathrow at the gate
11:30FR 3166 to Palermo leaves the gate
22 h 20 apart on the timetable, overnight
FR 3166 leaves 22 h 20 after LL 5423 arrives on the timetable: more than half a day, so not a connection we count.