BA 478 then QR 3591 at Barcelona
London Heathrow → Barcelona → Catania
Timetable, Barcelona time
12:40BA 478 from London Heathrow at the gate
11:00QR 3591 to Catania leaves the gatealso IB 5802, LL 5802, VY 6118
22 h 20 apart on the timetable, overnight
QR 3591 leaves 22 h 20 after BA 478 arrives on the timetable: more than half a day, so not a connection we count.