DL 514 then AA 3315 at Phoenix
Boston → Phoenix → Las Vegas
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
12:31AA 3315 to Las Vegas leaves the gate
14 h 38 apart on the timetable, overnight
AA 3315 leaves 14 h 38 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.