QR 3731 then BA 475 at Barcelona
Paris Orly → Barcelona → London Heathrow
Timetable, Barcelona time
12:15QR 3731 from Paris Orly at the gate
11:20BA 475 to London Heathrow leaves the gatealso IB 3658, LA 5488, AA 6814, VY 9640
23 h 05 apart on the timetable, overnight
BA 475 leaves 23 h 05 after QR 3731 arrives on the timetable: more than half a day, so not a connection we count.