DL 3122 then AA 4689 at Atlanta
Pittsburgh → Atlanta → Washington National
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
20:15AA 4689 to Washington National leaves the gate
22 h 15 apart on the timetable, overnight
AA 4689 leaves 22 h 15 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.