F3 573 then TK 1029 at Istanbul
Riyadh → Istanbul → Sofia
Timetable, Istanbul time
21:30F3 573 from Riyadh at the gate
20:35TK 1029 to Sofia leaves the gate
23 h 05 apart on the timetable, overnight
TK 1029 leaves 23 h 05 after F3 573 arrives on the timetable: more than half a day, so not a connection we count.