DL 9951 then DL 2174 at Atlanta
Queretaro → Atlanta → Charleston (South Carolina)
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
15:15DL 2174 to Charleston (South Carolina) leaves the gate
18 h 37 apart on the timetable, overnight
DL 2174 leaves 18 h 37 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.