DL 9951 then AA 3104 at Atlanta
Queretaro → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
14:58AA 3104 to Dallas-Fort Worth leaves the gate
18 h 20 apart on the timetable, overnight
AA 3104 leaves 18 h 20 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.