AI 3318 then 6E 6704 at Mumbai
Patna → Mumbai → New Delhi
Timetable, Mumbai time
23:15AI 3318 from Patna at the gate
13:456E 6704 to New Delhi leaves the gate
14 h 30 apart on the timetable, overnight
6E 6704 leaves 14 h 30 after AI 3318 arrives on the timetable: more than half a day, so not a connection we count.