LG 3837 then FR 6721 at Madrid
Luxembourg → Madrid → Marrakesh
Timetable, Madrid time
19:30LG 3837 from Luxembourg at the gate
13:10FR 6721 to Marrakesh leaves the gate
17 h 40 apart on the timetable, overnight
FR 6721 leaves 17 h 40 after LG 3837 arrives on the timetable: more than half a day, so not a connection we count.