B9 9735 then J1 4804 at Istanbul
Mashhad → Istanbul → Tehran
Timetable, Istanbul time
12:30B9 9735 from Mashhad at the gate
11:00J1 4804 to Tehran leaves the gate
22 h 30 apart on the timetable, overnight
J1 4804 leaves 22 h 30 after B9 9735 arrives on the timetable: more than half a day, so not a connection we count.