TK 6951 then A3 991 at Istanbul
Kars → Istanbul → Athens
Timetable, Istanbul time
17:45TK 6951 from Kars at the gate
11:30A3 991 to Athens leaves the gate
17 h 45 apart on the timetable, overnight
A3 991 leaves 17 h 45 after TK 6951 arrives on the timetable: more than half a day, so not a connection we count.