6E 5275 then SG 622 at Mumbai
Siliguri → Mumbai → Varanasi
Timetable, Mumbai time
13:106E 5275 from Siliguri at the gate
10:40SG 622 to Varanasi leaves the gate
21 h 30 apart on the timetable, overnight
SG 622 leaves 21 h 30 after 6E 5275 arrives on the timetable: more than half a day, so not a connection we count.