DL 9951 then DL 2170 at Atlanta
Queretaro → Atlanta → Valparaiso
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
15:49DL 2170 to Valparaiso leaves the gate
19 h 11 apart on the timetable, overnight
DL 2170 leaves 19 h 11 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.