SG 621 then AI 2855 at Mumbai
Udaipur → Mumbai → Cochin
Timetable, Mumbai time
20:45SG 621 from Udaipur at the gate
13:40AI 2855 to Cochin leaves the gate
16 h 55 apart on the timetable, overnight
AI 2855 leaves 16 h 55 after SG 621 arrives on the timetable: more than half a day, so not a connection we count.