EC 7668 then IB 534 at Lisbon
Luxembourg → Lisbon → Madrid
Timetable, Lisbon time
21:55EC 7668 from Luxembourg at the gate
16:45IB 534 to Madrid leaves the gate
18 h 50 apart on the timetable, overnight
IB 534 leaves 18 h 50 after EC 7668 arrives on the timetable: more than half a day, so not a connection we count.