F9 4702 then DL 3122 at Atlanta
Austin → Atlanta → Pittsburgh
Timetable, Atlanta time
19:10F9 4702 from Austin at the gate
17:08DL 3122 to Pittsburgh leaves the gate
21 h 58 apart on the timetable, overnight
DL 3122 leaves 21 h 58 after F9 4702 arrives on the timetable: more than half a day, so not a connection we count.