DL 1007 then DL 687 at Atlanta
Washington National → Atlanta → Phoenix
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
11:39DL 687 to Phoenix leaves the gate
13 h 58 apart on the timetable, overnight
DL 687 leaves 13 h 58 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.