H7 421 then TK 1451 at Istanbul
Chişinău → Istanbul → Porto
Timetable, Istanbul time
18:40H7 421 from Chişinău at the gate
13:25TK 1451 to Porto leaves the gate
18 h 45 apart on the timetable, overnight
TK 1451 leaves 18 h 45 after H7 421 arrives on the timetable: more than half a day, so not a connection we count.