AI 2573 then SG 9553 at Mumbai
New Delhi → Mumbai → Gorakhpur
Timetable, Mumbai time
07:55AI 2573 from New Delhi at the gate
21:25SG 9553 to Gorakhpur leaves the gate
13 h 30 apart on the timetable
SG 9553 leaves 13 h 30 after AI 2573 arrives on the timetable: more than half a day, so not a connection we count.