DL 905 then AM 979 at Atlanta
Salt Lake City → Atlanta → Monterrey
Timetable, Atlanta time
23:00DL 905 from Salt Lake City at the gate
12:30AM 979 to Monterrey leaves the gate
13 h 30 apart on the timetable, overnight
AM 979 leaves 13 h 30 after DL 905 arrives on the timetable: more than half a day, so not a connection we count.