DL 9951 then AA 2398 at Atlanta
Queretaro → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
17:30AA 2398 to Dallas-Fort Worth leaves the gate
20 h 52 apart on the timetable, overnight
AA 2398 leaves 20 h 52 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.