AI 2518 then 6E 6020 at Mumbai
Kolkata → Mumbai → Ahmedabad
Timetable, Mumbai time
11:20AI 2518 from Kolkata at the gate
09:306E 6020 to Ahmedabad leaves the gate
22 h 10 apart on the timetable, overnight
6E 6020 leaves 22 h 10 after AI 2518 arrives on the timetable: more than half a day, so not a connection we count.