KR 721 then TG 112 at Bangkok
Siem Reap → Bangkok → Chiang Mai
Timetable, Bangkok time
17:05KR 721 from Siem Reap at the gate
15:05TG 112 to Chiang Mai leaves the gate
22 h apart on the timetable, overnight
TG 112 leaves 22 h after KR 721 arrives on the timetable: more than half a day, so not a connection we count.