AK 6437 then AK 512 at Kuala Lumpur
Kota Baharu → Kuala Lumpur → Hanoi
Timetable, Kuala Lumpur time
17:25AK 6437 from Kota Baharu at the gate
12:00AK 512 to Hanoi leaves the gate
18 h 35 apart on the timetable, overnight
AK 512 leaves 18 h 35 after AK 6437 arrives on the timetable: more than half a day, so not a connection we count.