DL 9951 then AA 1276 at Atlanta
Queretaro → Atlanta → Dallas-Fort Worth
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
13:36AA 1276 to Dallas-Fort Worth leaves the gate
16 h 58 apart on the timetable, overnight
AA 1276 leaves 16 h 58 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.