DL 514 then AA 1939 at Phoenix
Boston → Phoenix → Austin
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
16:29AA 1939 to Austin leaves the gate
18 h 36 apart on the timetable, overnight
AA 1939 leaves 18 h 36 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.