AK 6437 then QZ 121 at Kuala Lumpur
Kota Baharu → Kuala Lumpur → Medan
Timetable, Kuala Lumpur time
17:25AK 6437 from Kota Baharu at the gate
12:10QZ 121 to Medan leaves the gate
18 h 45 apart on the timetable, overnight
QZ 121 leaves 18 h 45 after AK 6437 arrives on the timetable: more than half a day, so not a connection we count.