DL 9941 then AM 979 at Atlanta
Queretaro → Atlanta → Monterrey
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
12:30AM 979 to Monterrey leaves the gate
16 h 47 apart on the timetable, overnight
AM 979 leaves 16 h 47 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.