SQ 710 then UL 407 at Bangkok
Singapore → Bangkok → Colombo
Timetable, Bangkok time
14:35SQ 710 from Singapore at the gate
13:55UL 407 to Colombo leaves the gate
23 h 20 apart on the timetable, overnight
UL 407 leaves 23 h 20 after SQ 710 arrives on the timetable: more than half a day, so not a connection we count.