DL 514 then AA 3996 at Phoenix
Boston → Phoenix → Tucson
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
13:22AA 3996 to Tucson leaves the gate
15 h 29 apart on the timetable, overnight
AA 3996 leaves 15 h 29 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.