DL 3122 then DL 3161 at Atlanta
Pittsburgh → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
22:00DL 3122 from Pittsburgh at the gate
20:25DL 3161 to Dallas-Fort Worth leaves the gate
22 h 25 apart on the timetable, overnight
DL 3161 leaves 22 h 25 after DL 3122 arrives on the timetable: more than half a day, so not a connection we count.