AI 2987 then SG 622 at Mumbai
New Delhi → Mumbai → Varanasi
Timetable, Mumbai time
15:20AI 2987 from New Delhi at the gate
10:40SG 622 to Varanasi leaves the gate
19 h 20 apart on the timetable, overnight
SG 622 leaves 19 h 20 after AI 2987 arrives on the timetable: more than half a day, so not a connection we count.