KL 3379 then IB 725 at Madrid
Lanzarote → Madrid → London Heathrow
Timetable, Madrid time
21:00KL 3379 from Lanzarote at the gatealso AF 4837, DL 6773, AM 6823, EY 7580, UX 9076
17:20IB 725 to London Heathrow leaves the gatealso LA 1704, VY 5180, BA 7058
20 h 20 apart on the timetable, overnight
IB 725 leaves 20 h 20 after KL 3379 arrives on the timetable: more than half a day, so not a connection we count.