DL 9941 then DL 2780 at Atlanta
Queretaro → Atlanta → Dallas
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
16:46DL 2780 to Dallas leaves the gate
21 h 03 apart on the timetable, overnight
DL 2780 leaves 21 h 03 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.