3O 391 then IB 921 at Madrid
Tangier → Madrid → Dakar
Timetable, Madrid time
20:003O 391 from Tangier at the gate
18:00IB 921 to Dakar leaves the gatealso VY 5271, QR 6559, BA 7118, AA 8766
22 h apart on the timetable, overnight
IB 921 leaves 22 h after 3O 391 arrives on the timetable: more than half a day, so not a connection we count.