UB 19 then SQ 719 at Bangkok
Yangon → Bangkok → Singapore
Timetable, Bangkok time
08:35UB 19 from Yangon at the gate
21:15SQ 719 to Singapore leaves the gate
12 h 40 apart on the timetable
SQ 719 leaves 12 h 40 after UB 19 arrives on the timetable: more than half a day, so not a connection we count.