DL 514 then AA 4971 at Phoenix
Boston → Phoenix → El Paso
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
12:38AA 4971 to El Paso leaves the gate
14 h 45 apart on the timetable, overnight
AA 4971 leaves 14 h 45 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.