6E 449 then SG 488 at Mumbai
New Delhi → Mumbai → Port Blair
Timetable, Mumbai time
07:256E 449 from New Delhi at the gate
05:55SG 488 to Port Blair leaves the gate
22 h 30 apart on the timetable, overnight
SG 488 leaves 22 h 30 after 6E 449 arrives on the timetable: more than half a day, so not a connection we count.