DL 1247 then DL 830 at Atlanta
Chicago O'Hare → Atlanta → Salt Lake City
Timetable, Atlanta time
09:55DL 1247 from Chicago O'Hare at the gate
08:05DL 830 to Salt Lake City leaves the gate
22 h 10 apart on the timetable, overnight
DL 830 leaves 22 h 10 after DL 1247 arrives on the timetable: more than half a day, so not a connection we count.