DL 514 then AA 1999 at Phoenix
Boston → Phoenix → Dallas-Fort Worth
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
12:49AA 1999 to Dallas-Fort Worth leaves the gate
14 h 56 apart on the timetable, overnight
AA 1999 leaves 14 h 56 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.