AI 2492 then 6E 2528 at Mumbai
Lucknow → Mumbai → Madurai
Timetable, Mumbai time
18:55AI 2492 from Lucknow at the gate
18:306E 2528 to Madurai leaves the gate
23 h 35 apart on the timetable, overnight
6E 2528 leaves 23 h 35 after AI 2492 arrives on the timetable: more than half a day, so not a connection we count.