DL 687 then AA 2778 at Phoenix
Atlanta → Phoenix → Boston
Timetable, Phoenix time
13:50DL 687 from Atlanta at the gate
13:43AA 2778 to Boston leaves the gate
23 h 53 apart on the timetable, overnight
AA 2778 leaves 23 h 53 after DL 687 arrives on the timetable: more than half a day, so not a connection we count.