DL 514 then WN 908 at Phoenix
Boston → Phoenix → Las Vegas
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
19:00WN 908 to Las Vegas leaves the gate
21 h 07 apart on the timetable, overnight
WN 908 leaves 21 h 07 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.