DL 9941 then DL 3122 at Atlanta
Queretaro → Atlanta → Pittsburgh
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
17:08DL 3122 to Pittsburgh leaves the gate
21 h 25 apart on the timetable, overnight
DL 3122 leaves 21 h 25 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.