DL 9941 then DL 519 at Atlanta
Queretaro → Atlanta → Denver
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
17:09DL 519 to Denver leaves the gate
21 h 26 apart on the timetable, overnight
DL 519 leaves 21 h 26 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.