DL 514 then AA 853 at Phoenix
Boston → Phoenix → Dallas-Fort Worth
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
16:02AA 853 to Dallas-Fort Worth leaves the gate
18 h 09 apart on the timetable, overnight
AA 853 leaves 18 h 09 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.