QR 3755 then IB 5834 at Barcelona
Paris Orly → Barcelona → London Gatwick
Timetable, Barcelona time
23:30QR 3755 from Paris Orly at the gatealso IB 5879, LL 5879, VY 8029
19:50IB 5834 to London Gatwick leaves the gatealso LL 5834, VY 7626, BA 8080
20 h 20 apart on the timetable, overnight
IB 5834 leaves 20 h 20 after QR 3755 arrives on the timetable: more than half a day, so not a connection we count.