AI 2977 then 6E 5224 at Mumbai
New Delhi → Mumbai → Kolkata
Timetable, Mumbai time
23:20AI 2977 from New Delhi at the gate
23:106E 5224 to Kolkata leaves the gate
23 h 50 apart on the timetable, overnight
6E 5224 leaves 23 h 50 after AI 2977 arrives on the timetable: more than half a day, so not a connection we count.