DL 1492 then DL 4279 at Salt Lake City
St Louis → Salt Lake City → St George
Timetable, Salt Lake City time
21:18DL 1492 from St Louis at the gate
20:45DL 4279 to St George leaves the gate
23 h 27 apart on the timetable, overnight
DL 4279 leaves 23 h 27 after DL 1492 arrives on the timetable: more than half a day, so not a connection we count.