HH 575 then TK 2658 at Istanbul
Tashkent → Istanbul → Sivas
Timetable, Istanbul time
17:50HH 575 from Tashkent at the gate
09:15TK 2658 to Sivas leaves the gate
15 h 25 apart on the timetable, overnight
TK 2658 leaves 15 h 25 after HH 575 arrives on the timetable: more than half a day, so not a connection we count.