TK 6951 then TK 1991 at Istanbul
Kars → Istanbul → Manchester
Timetable, Istanbul time
17:45TK 6951 from Kars at the gate
11:35TK 1991 to Manchester leaves the gate
17 h 50 apart on the timetable, overnight
TK 1991 leaves 17 h 50 after TK 6951 arrives on the timetable: more than half a day, so not a connection we count.