TK 6887 then BJ 691 at Istanbul
Tbilisi → Istanbul → Tunis
Timetable, Istanbul time
18:30TK 6887 from Tbilisi at the gate
12:50BJ 691 to Tunis leaves the gate
18 h 20 apart on the timetable, overnight
BJ 691 leaves 18 h 20 after TK 6887 arrives on the timetable: more than half a day, so not a connection we count.