TK 2143 then TK 236 at Istanbul
Ankara → Istanbul → Ulaanbaatar
Timetable, Istanbul time
20:25TK 2143 from Ankara at the gate
18:15TK 236 to Ulaanbaatar leaves the gate
21 h 50 apart on the timetable, overnight
TK 236 leaves 21 h 50 after TK 2143 arrives on the timetable: more than half a day, so not a connection we count.