DL 9951 then DL 2009 at Atlanta
Queretaro → Atlanta → San Antonio
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
14:10DL 2009 to San Antonio leaves the gate
17 h 32 apart on the timetable, overnight
DL 2009 leaves 17 h 32 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.