6E 5087 then AI 2276 at Mumbai
Kolkata → Mumbai → Colombo
Timetable, Mumbai time
00:356E 5087 from Kolkata at the gate
12:40AI 2276 to Colombo leaves the gate
12 h 05 apart on the timetable
AI 2276 leaves 12 h 05 after 6E 5087 arrives on the timetable: more than half a day, so not a connection we count.