DY 1718 then IB 723 at Madrid
Oslo → Madrid → London Heathrow
Timetable, Madrid time
19:15DY 1718 from Oslo at the gate
16:45IB 723 to London Heathrow leaves the gatealso LA 1702, VY 5421, QR 6907, BA 7050, AA 8770
21 h 30 apart on the timetable, overnight
IB 723 leaves 21 h 30 after DY 1718 arrives on the timetable: more than half a day, so not a connection we count.