B9 9735 then J1 4872 at Istanbul
Mashhad → Istanbul → GBT
Timetable, Istanbul time
13:30B9 9735 from Mashhad at the gate
11:00J1 4872 to GBT leaves the gate
21 h 30 apart on the timetable, overnight
J1 4872 leaves 21 h 30 after B9 9735 arrives on the timetable: more than half a day, so not a connection we count.