EK 571 then HY 3254 at Dubai
Kolkata → Dubai → Moscow Vnukovo
Timetable, Dubai time
13:00EK 571 from Kolkata at the gate
12:00HY 3254 to Moscow Vnukovo leaves the gate
23 h apart on the timetable, overnight
HY 3254 leaves 23 h after EK 571 arrives on the timetable: more than half a day, so not a connection we count.