9I 612 then 6E 1637 at Mumbai
Ahmedabad → Mumbai → Hanoi
Timetable, Mumbai time
10:509I 612 from Ahmedabad at the gate
04:106E 1637 to Hanoi leaves the gate
17 h 20 apart on the timetable, overnight
6E 1637 leaves 17 h 20 after 9I 612 arrives on the timetable: more than half a day, so not a connection we count.