DL 423 then DL 1210 at Salt Lake City
Atlanta → Salt Lake City → San Diego
Timetable, Salt Lake City time
16:03DL 423 from Atlanta at the gate
15:24DL 1210 to San Diego leaves the gate
23 h 21 apart on the timetable, overnight
DL 1210 leaves 23 h 21 after DL 423 arrives on the timetable: more than half a day, so not a connection we count.