DL 4022 then DL 4279 at Salt Lake City
Jackson → Salt Lake City → St George
Timetable, Salt Lake City time
08:35DL 4022 from Jackson at the gate
20:45DL 4279 to St George leaves the gate
12 h 10 apart on the timetable
DL 4279 leaves 12 h 10 after DL 4022 arrives on the timetable: more than half a day, so not a connection we count.