H7 421 then BA 677 at Istanbul
Chişinău → Istanbul → London Heathrow
Timetable, Istanbul time
16:10H7 421 from Chişinău at the gate
15:00BA 677 to London Heathrow leaves the gate
22 h 50 apart on the timetable, overnight
BA 677 leaves 22 h 50 after H7 421 arrives on the timetable: more than half a day, so not a connection we count.