SG 2455 then SG 622 at Mumbai
Kandla → Mumbai → Varanasi
Timetable, Mumbai time
12:20SG 2455 from Kandla at the gate
10:40SG 622 to Varanasi leaves the gate
22 h 20 apart on the timetable, overnight
SG 622 leaves 22 h 20 after SG 2455 arrives on the timetable: more than half a day, so not a connection we count.