DL 1407 then DL 916 at Detroit
Raleigh-Durham → Detroit → Las Vegas
Timetable, Detroit time
20:48DL 1407 from Raleigh-Durham at the gate
20:05DL 916 to Las Vegas leaves the gate
23 h 17 apart on the timetable, overnight
DL 916 leaves 23 h 17 after DL 1407 arrives on the timetable: more than half a day, so not a connection we count.