DL 9951 then DL 423 at Atlanta
Queretaro → Atlanta → Salt Lake City
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
13:55DL 423 to Salt Lake City leaves the gate
17 h 17 apart on the timetable, overnight
DL 423 leaves 17 h 17 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.