SG 621 then SG 2456 at Mumbai
Udaipur → Mumbai → Kandla
Timetable, Mumbai time
20:45SG 621 from Udaipur at the gate
16:05SG 2456 to Kandla leaves the gate
19 h 20 apart on the timetable, overnight
SG 2456 leaves 19 h 20 after SG 621 arrives on the timetable: more than half a day, so not a connection we count.