H7 421 then TK 1971 at Istanbul
Chişinău → Istanbul → London Heathrow
Timetable, Istanbul time
22:30H7 421 from Chişinău at the gate
15:25TK 1971 to London Heathrow leaves the gate
16 h 55 apart on the timetable, overnight
TK 1971 leaves 16 h 55 after H7 421 arrives on the timetable: more than half a day, so not a connection we count.