6E 1385 then SQ 719 at Bangkok
Chennai → Bangkok → Singapore
Timetable, Bangkok time
09:106E 1385 from Chennai at the gate
21:15SQ 719 to Singapore leaves the gate
12 h 05 apart on the timetable
SQ 719 leaves 12 h 05 after 6E 1385 arrives on the timetable: more than half a day, so not a connection we count.