EC 7668 then IB 536 at Lisbon
Luxembourg → Lisbon → Madrid
Timetable, Lisbon time
21:55EC 7668 from Luxembourg at the gate
18:45IB 536 to Madrid leaves the gate
20 h 50 apart on the timetable, overnight
IB 536 leaves 20 h 50 after EC 7668 arrives on the timetable: more than half a day, so not a connection we count.