AI 2492 then 6E 5086 at Mumbai
Lucknow → Mumbai → Kolkata
Timetable, Mumbai time
18:55AI 2492 from Lucknow at the gate
18:156E 5086 to Kolkata leaves the gate
23 h 20 apart on the timetable, overnight
6E 5086 leaves 23 h 20 after AI 2492 arrives on the timetable: more than half a day, so not a connection we count.