QR 3721 then BA 489 at Barcelona
Granada → Barcelona → London Heathrow
Timetable, Barcelona time
22:50QR 3721 from Granada at the gate
19:25BA 489 to London Heathrow leaves the gatealso AA 7087, VY 9612
20 h 35 apart on the timetable, overnight
BA 489 leaves 20 h 35 after QR 3721 arrives on the timetable: more than half a day, so not a connection we count.