QR 3721 then BA 495 at Barcelona
Granada → Barcelona → London Heathrow
Timetable, Barcelona time
22:50QR 3721 from Granada at the gate
20:50BA 495 to London Heathrow leaves the gatealso IB 3821, AA 6817, CX 7171, VY 9614
22 h apart on the timetable, overnight
BA 495 leaves 22 h after QR 3721 arrives on the timetable: more than half a day, so not a connection we count.