DL 9951 then DL 374 at Atlanta
Queretaro → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
15:59DL 374 to Dallas-Fort Worth leaves the gate
19 h 21 apart on the timetable, overnight
DL 374 leaves 19 h 21 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.