DL 514 then AA 6457 at Phoenix
Boston → Phoenix → Tucson
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
18:51AA 6457 to Tucson leaves the gate
20 h 58 apart on the timetable, overnight
AA 6457 leaves 20 h 58 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.