KR 721 then VZ 326 at Bangkok
Siem Reap → Bangkok → Hat Yai
Timetable, Bangkok time
17:05KR 721 from Siem Reap at the gate
16:05VZ 326 to Hat Yai leaves the gate
23 h apart on the timetable, overnight
VZ 326 leaves 23 h after KR 721 arrives on the timetable: more than half a day, so not a connection we count.