DL 514 then DL 366 at Phoenix
Boston → Phoenix → Atlanta
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
16:17DL 366 to Atlanta leaves the gate
18 h 24 apart on the timetable, overnight
DL 366 leaves 18 h 24 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.