DL 514 then AA 6436 at Phoenix
Boston → Phoenix → Tucson
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
21:50AA 6436 to Tucson leaves the gate
23 h 57 apart on the timetable, overnight
AA 6436 leaves 23 h 57 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.