H7 421 then TK 6891 at Istanbul
Chişinău → Istanbul → Moscow Vnukovo
Timetable, Istanbul time
22:30H7 421 from Chişinău at the gate
16:30TK 6891 to Moscow Vnukovo leaves the gate
18 h apart on the timetable, overnight
TK 6891 leaves 18 h after H7 421 arrives on the timetable: more than half a day, so not a connection we count.